Part 2

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_ We have seen that the river when it is regarded as an avenue of access to men for commerce or for travel is, especially in early times, and with boats of light draught, of one piece from Lechlade to London Bridge. There was in this section always sufficient water even in a dry summer to float some sort of a boat. But the river, regarded as a barrier or obstacle for human beings in their movement up and down Britain, did not form one such united section. On the contrary, it divided itself, as all such rivers do, into two very clearly defined parts: there was that upper part which could be crossed at frequent intervals by an army, that lower part in which fords are rare.

In most rivers one has nothing more to do in describing those two sections than to show how gradually they merge into one another. In most rivers the passage of the upper waters is perfectly easy, and as one descends the fords get rarer and rarer, until at last they cease.

With the Thames this is not the case. The two portions of the river are sharply divided in the vicinity of Oxford, and that for reasons which we have already seen when we were speaking of the suitability of its banks for habitation. The upper Thames is indeed shallow and narrow, and there are innumerable places above Oxford where it could be crossed, so far as the volume of its waters was concerned. It was crossed by husbandmen wherever a village or a farm stood upon its banks. Perhaps the highest point at which it had to be crossed at one chosen spot is to be discovered in the word Somer_ford_ Keynes, but the ease with which the water itself could be traversed is apparent rather in the absence than in the presence of names of this sort upon the upper Thames. Shifford, for instance, which used to be spelt Siford, may just as well have been named from the crossing of the Great Brook as from the crossing of the Thames. The only other is Duxford.

While, however, the upper Thames was thus easy to cross where individuals only or small groups of cattle were concerned, the marshes on either side always made it difficult for an army. The records of early fighting are meagre, and often legendary, but such as they are you do not find the upper Thames crossed and recrossed as are the upper Severn or the upper Trent. There are two points of passage: Cricklade and Oxford, nor can the passage from Oxford be made westward over the marshes. It is confined to the ford going north and south.

Below Oxford, after the entry of the Cherwell, and from thence down to a point not very easily determined, but which is perhaps best fixed at Wallingford, the Thames is only passable at fixed crossings in ordinary weather, as at Sandford, where the hard gravels approach the bank upon either side, and at other places, each distant from the next by long stretches of river.

It is not easy, now that the river has been locked, to determine precisely where all these original crossings are to be found.

The records of Abingdon and its bridge make it certain that a difficult ford existed here; the name "Burford" attached to the bridge points to the ancient ford at this spot. It is a name to be discovered in several other parts of England where there has been some ancient crossing of a river, as, for instance, the crossing of the Mole in Surrey by the Roman military road.

The next place below Abingdon may have been at Appleford, but was more likely between the high cliff at Clifton-Hampden and the high and dry spit of Long Wittenham. Below this again for miles there was no easy crossing of the river.

The Thames was certainly impassable at Dorchester. The whole importance of Dorchester indeed in history lies in its being a strong fortified position, and it depends for its defence upon the depth of the river, which swirls round the peninsula occupied by the camp.

It has been conjectured that there was a Roman ford or ferry at the east end of Little Wittenham Wood, where it touches the river. The conjecture is ill supported. No track leads to this spot from the south, and close by is an undoubted ford where now stands Shillingford Bridge.

Below this again there was no crossing until one got to Wallingford; and here we reach a point of the greatest importance in the history of the Thames and of England.

Wallingford was not the lowest point at which the Thames could ever be crossed. So far was this from being the case that the _tidal_ Thames could be crossed in several places on the ebb, notably at the passage between Ealing and Kew, where Kew Bridge now stands; and, as we shall see, the Thames was passable at many other places. But the special character of the passage at Wallingford lay in the fact that it was a ford upon which one could always depend. Below Wallingford the crossings were either only to be effected in very dry seasons or, though normally usable, might be interrupted by rain.

It is at Wallingford, therefore, that the main lowest passage of the Thames was effected, and it was through Wallingford that Berkshire communicated with the Chilterns. Wallingford is, then, the second point of division upon the Thames when one is regarding that river as a defence or a boundary. Below Wallingford there was perhaps a regular crossing at Pangbourne; there was certainly a ford of great importance between Streatley and Goring; and all the way down the river at intervals were difficult but practicable passages--notably at Cowey Stakes between the Surrey and the Middlesex shore, a place which is the traditional crossing of Caesar. The water here in normal weather was, however, as much as five feet deep, and this ford well illustrates the difficulties of all the lower crossings of the Thames.

The effect of the river as a barrier must, of course, have largely depended upon the level to which the waters rose in early times. It is exceedingly difficult to get any evidence upon this--first, because however far you go back in English history some sort of control seems always to have been imposed upon the river; and secondly, because the early overflows have left little permanent effect.

As an example of the antiquity of the regulation of the Thames we have the embankment round the Isle of Dogs, which is Roman or pre-Roman in its origin, like the sea-wall of the Wash, which defends the Fenland; and at Ealing, Staines, Abingdon, and twenty other places we have sites probably pre-historic, and certainly at the beginnings of history, which could never have been inhabited if the neighbouring fields had not been drained or protected. The regularity of the stream has therefore been somewhat artificial throughout all the centuries of recorded history, and the banks have had ample time to acquire consistency.

It is certain, of course, that works of planting, of draining, or of embankment, which required continuous energy, skill, and capital, decayed after the coming of the Saxon pirates, and were not undertaken again with full vigour until after the Norman Conquest. Even to-day the work is not quite complete, though every year sees its improvement: we are still unable to prevent regularly recurrent floods in the flats round Oxford and below the gorge of the Chilterns; but for the purpose of this argument the chief fact to be noted is that no serious interruption to the approach of the river seems to have existed in historic times.

In pre-historic times many stretches of the river must have afforded great difficulties of approach. The mouths of the Ock, the Coln, the Kennet, the Mole, and the Wandle must each have been surrounded by a marsh; all the plain between Oxford and the Hinkseys must have been partially flooded, as must the upper reaches between Lechlade and Witham (on one side or the other of the stream as it winds from the southern to the northern rises of land), and as must also have been the long stretch of the right bank below Reading. The highest spring tides may have been felt as high up the stream as Staines, and both the character of the surface and the contour lines permit one to conjecture that the valley of the Wandle and several other inlets from the lower river were flooded. Yet it is remarkable that in this alluvium, more disturbed and dug than any other in Europe, little or nothing of human relics, of boats, or of piles has been discovered, and this absence of testimony also points to the remoteness of date from which we should reckon the human control of the river.

Here, as in many other conjectures concerning early history or pre-history, one is convinced of that safe rule which, in Europe at least, bids us never exaggerate the changes achieved by the last few centuries or the contrast between recorded and unrecorded things.

The tendency of most modern history in this country has been to exaggerate such changes and such contrasts. In the greater part of modern popular history care is taken to emphasise the difference between the Middle and Dark Ages and the last few centuries. The forests of England are represented as impassable, or nearly so; the numbers of the population are grossly underestimated; the towns which have had a continuous municipal existence of 1500 years are represented as villages.

The same spirit would tend to make of the Thames Valley in the Dark and Middle Ages a very different landscape from that which we see to-day. The floods were indeed more common and the passage of the river somewhat more difficult; cultivation did not everywhere approach the banks as it does now; and in two or three spots where there has been a great development of modern building, notably at Reading, and, of course, in London, the banks have been artificially strengthened. But with these exceptions it may be confidently asserted that no belt of densely inhabited landscape in England has changed so little in its natural features as the Thames Valley.

There are dozens of reaches upon the upper Thames where little is in sight save the willows, the meadows, and a village church tower, which present exactly the same aspect to-day as they did when that church was first built. You might put a man of the fifteenth century on to the water below St. John's Lock, and, until he came to Buscot Lock, he would hardly know that he had passed into a time other than his own. The same steeple of Lechlade would stand as a permanent landmark beyond the fields, and, a long way off, the same church of Eaton Hastings, which he had known, would show above the trees.

There is another method of judging the comparative smallness of the change, and it is a method which can be applied to many other parts of England whose desertion or wildness in the Dark and early Middle Ages has been too confidently asserted. That method is to note where human settlements were and are found. With the exception of the long and probably marshy piece between Radcot and Shifford the whole of the upper Thames was dotted with such settlements, which, though small, were quite close to the banks. Kelmscott is right up against the river in what one would otherwise have imagined to be land too marshy for building until modern times. Buscot, on the other bank, is not only close to the river, but was a royal manor of high historical importance in the eleventh century. Eaton Hastings is similarly placed right against the bank; so was in its day the palace of Kempsford above Lechlade, and so is the church of Inglesham between the two. All the way down you have at intervals old stonework and old place names, indicating habitation upon the upper Thames.

A proper system of locks is comparatively modern on any European river. The invention is even said (upon doubtful authority) to be as late as the sixteenth century, but the method of regulating the waters of a river by weirs is immemorial.

We have no earlier record of weirs upon the Thames than that in Magna Charta; but some such system must have existed from the time when men first used the Thames in a regular manner for commerce.

There is but one place left in which one can still reconstruct for oneself the aspect of such weirs as were till but little more than a century ago the universal method of canalising the river. Modern weirs are merely adjuncts to locks, and are usually found upon a branch of the stream other than that which leads up to the lock. But in this weir the old fashion of crossing the whole stream is still preserved. There is no lock, and when a boat would pass up or down the paddles of the weir have to be lifted. It is, in a modern journey upon the upper Thames, the one faint incident which the day affords, for if one is going down the stream but few paddles are lifted, and the boat shoots a small rapid, while to admit a boat going up stream the whole weir is raised, and, even so, a great rush of water opposes the boat as it is hauled through. Some years ago there were several of these weirs upon the upper river. They have all been superseded by locks, and it is probable that this last one will not long survive.

Such weirs did certainly sufficiently regulate the stream as to make its banks regularly habitable. If no local order, at least the interest of villagers in their mills sufficed to the watching of the stream.

We have in the place names upon the Thames a further evidence of the antiquity of its regulation, for, as will be seen in a moment, none give proof of any important settlement later than the eleventh century.

These place names not only indicate a continuous and early settlement of the banks, but also form in themselves a very interesting series, whose etymology is a little section of the history of England.

Of purely Celtic names very few survive in the sites of human habitation, though the names of the waterways are almost universally Celtic, as is the name of Thames itself. But it is probable that in the Saxon names which line the river there are many corruptions of Celtic words made to sound in the Saxon fashion. We cannot prove such origins. We can surmise with justice that the "tons" and "dons" all up and down England are Celtic terminations; they are almost unknown in Germany. There is a somewhat pedantic guess, drawn (it is said) from Iceland, that we got this national name ending from Scandinavia; so universal a habit would hardly have arisen from an admixture of Scandinavian blood received at the very close of the Dark Ages and affecting but small patches of North England. Moreover, as against this theory, there is the fact that quite half the Celtic place names mentioned in our early history and in that of Gaul had a similar termination. London itself is the best example.

If, however, we neglect this termination, and consider the first part of the words in which it occurs (as in Abing-don, Bensing-ton, Ea-ton, etc.), we shall find that most of the place names are Saxon in form, and some certainly Saxon in derivation.

Thus Ea-ton, a name scattered all along the Thames, from its very source to the last reaches, is the "tun" by the water or stream. Clif-ton (as in Clifton-Hampden) is the "ton" on the cliff, a very marked feature of the left bank of the river at this place. Of Bensing-ton, now Benson, we know nothing, nor do we of the origin of the word Abing-don.

The names terminating in "ham" are, in their termination at least, certainly Teutonic; and the same may be true of most of those--but not all of those--ending in "ford." Ford may just as well be a Celtic as a Teutonic ending, and in either case means a "passage," a "going." It does not even in all cases indicate a shallow passage, though in the great majority of cases on the Thames it does indicate a place where one could cross the river on foot. Thus Wallingford was probably the walled or embattled ford, and Oxford almost certainly the "ford of the droves"--droves going north from Berkshire. One may say roughly that all the "hams" were Teutonic save where one can put one's finger on a probable Celtic derivation such as one has, for instance, in the case of Witham, which should mean the settlement upon the "bend" or curve of the river, a Celtic name with a Teutonic ending.

One may also believe that the termination "or" or "ore" is Teutonic; Cumnor may have meant "the wayfarers' stage," and Windsor probably "the landing place on the winding of the river."

Hythe also is thought to be Teutonic. One can never be quite sure with a purely Anglo-Saxon word, that it had a German origin, but at least Hythe is Anglo-Saxon, a wharf or stage; thus Bablock Hythe on the road through the Roman town of Eynsham across the river to Cumnor and Abingdon, cutting off the great bend of the river at Witham; so also the town we now call "Maidenhead," which was perhaps the "mid-Hythe" between Windsor and Reading. Some few certainly Celtic names do survive: in the Sinodun Hills, for instance, above Dorchester; and the first part of the name Dorchester itself is Celtic. At the very head of the Thames you have Coates, reminding one of the Celtic name for the great wood that lay along the hill; but just below, where the water begins, to flow, Kemble and Ewen, if they are Saxon, are perhaps drawn from the presence of a "spring." Cricklade may be all Celtic, or may be partly Celtic and partly Saxon. London is Celtic, as we have seen. And in the mass of places whose derivation it is impossible to establish the primitive roots of a Celtic place name may very possibly survive.

The purely Roman names have quite disappeared, and, what is odd, they disappeared more thoroughly in the Thames Valley than in any other part of England. Dorchester alone preserves a faint reminiscence of its Romano-Celtic name; but Bicester to the north, and the crossing of the ways at Alchester, are probably Saxon in the first part at least. Streatley has a Roman derivation, as have so many similar names throughout England which stand upon a "strata" or "way" of British or of Roman origin. But though "Spina" is still Speen, Ad Pontes, close by, one of the most important points upon the Roman Thames, has lost its Roman name entirely, and is known as Staines: the stones or stone which marked the head of the jurisdiction of London upon the river.

To return to the river regarded as a _boundary_, it is subject to this rather interesting historical observation that it has been more of a boundary in highly civilised than in barbaric times.

One would expect the exact contrary to be the case. A civilised man can cross a river more easily than a barbarian; and in civilised times there are permanent bridges, where in barbaric times there would be only fords or ferries.

Nevertheless, it is true of the Thames, as of nearly every other division in Europe, that it was much more of a boundary at the end of the Roman Empire, and is more of a strict boundary to-day, than it was during the Dark Ages, and presumably also before the Claudian invasion. Thus we may conjecture with a fair accuracy that in the last great ordering of boundaries within the Roman Empire, which was the work of Diocletian, and so much of which still survives in our European politics to-day (for instance, the boundary of Normandy), the Thames formed the division between Southern and Midland Britain. It is equally certain that it did _not_ form any exact division between Wessex and Mercia.

The estuary has, of course, always formed a division, and in the barbarian period it separated the higher civilisation of Kent from that of the East Saxons, who were possibly of a different race, and certainly of a different culture. But the Thames above London Bridge was not a true boundary until the civilisation of England began to form, towards the close of the Dark Ages. It is perpetually crossed and recrossed by contending armies, and the first result of a success is to cause the conqueror to annex a belt from the farther bank to his own territories.

It is further remarkable that the one great definite boundary of the Dark Ages in England--that which was established for a few years by Alfred between his kingdom and the territory of the Danish invaders--abandons the Thames above bridges altogether, and uses it as a limitation in its estuarial part only, up to the mouth of the Lea.

With the definition of exact frontiers for the English counties, however, a process whose origin can hardly antedate the Norman Conquest by many years, the Thames at once becomes of the utmost importance as a boundary.

Its higher and hardly navigable streams are not so used. The upper Thames and its little tributaries for some ten miles from its source are not only indifferent to county boundaries, but run through a territory which has been singularly indefinite in the past. For instance, the parish of Kemble, wherein the first waters now appear, has been counted now in Gloucester, now in Wilts. But when these ten miles are run, just after Castle Eaton Bridge, and not quite half way between that bridge and the old royal palace at Kempsford, the Thames becomes the line of division between two counties, and from there to the sea it never loses its character of a boundary.

It is a tribute to the great place of the river in history that there is no other watercourse in England nor any other natural division of which this is so universally true.

The reason that the Thames, like so many other European boundaries, has come late into the process of demarcation, and the reason that its use as a limit is more apparent in civilised than in uncivilised times, is simply the fact that limits and boundaries themselves are never of great exactitude save in times of comparatively high civilisation. It is when a complex system of law and a far-reaching power of execution are present in a country that the necessity for precise delimitation arises. In the barbaric period of England there was no such necessity. Doubtless the men of Berkshire and the men of Oxfordshire felt themselves to be in general divided by the stream; but had we documents to hand (which, of course, we have not) it might be possible to show that exceptional tracts, such as the isolated Hill of Witham (which is much more influenced by Oxford than by Abingdon), was treated as the land of Oxfordshire men in early times, or was perhaps a territory in dispute; and something of the same sort may have existed in the connection of Caversham with Reading.

In this old age of our civilisation the exactitude of the boundary which the Thames establishes is apparent in various survivals. Islands now joined to the one bank and indistinguishable from the rest of the shore are still annexed to the farther shore. Such a patch is to be found at Streatley, geographically in Berkshire, legally in Oxford; there is another opposite Staines, which Middlesex claims from Surrey. In all, half-a-dozen or more such anomalous frontiers mark the course of the old river. One arrested in process of formation may be seen at Pentonhook.

A boundary--that is, an obstacle to travel--has this further feature, that the point at which it is crossed--that is, the point at which the obstacle is surmounted--is certain to become a point of strategic and often of commercial importance. So it is with the passes over mountains and with the narrows of the sea, and so it is with fords and bridges over rivers. So it is with the Thames.

The energies both of travel and of war are driven towards and confined in such spots. Fortresses arise and towns which they may defend. Depots of goods are formed, the coining and the change of money are established, secure meeting places for speculation are founded.

Such passages over the Thames were of two sorts: there are first the original fords, numerous and primeval; next the crossing places of the great roads.

Of the original fords we have already drawn up a list. Few have, merely as fords, proved to be of strategic or commercial value. Oxford may have been an early exception; and the difficult passage at Abingdon founded a great monastery but no military post: the rise of each was connected, as was Reading (which had no ford), with the junction of a tributary. Wallingford alone, in its character of the last easy and practicable ford down the river, had for centuries an importance certainly due to geographical causes alone. Two principal events of English history--the crossing of the Thames by the Conqueror and the successful challenge of Henry II. to Stephen--depend upon the site of this crossing. Long before their time it had been of capital importance to the Saxon kings, so early as Offa and so late as Alfred. If the bridges built at Abingdon in the fifteenth century had not gradually deflected the western road, Wallingford might still count the fourteen churches and the large population which it possessed for so many centuries.

Apart from Wallingford, however, the fords, as fords, did little to build up towns or to determine the topography of English history. Of more importance were the crossings of the great _roads_.

When one remembers that the south of England was originally by far the wealthiest part of the country, and when one considers the shape of Ireland, it is evident that certain main tracks would lead from north to south, and that most or all of these would be compelled to cross the Thames Valley. We find four such primeval ways.

One from the Straits of Dover in the south-east to the north-western centres of the Welsh Marches and of Chester, the Port for Ireland, and so up west of the Pennines. This came in Saxon times to be called the _Watling Street_, a name common to other lesser lanes.

Another, the converse to this, proceeded from the metal mines of the south-west to the north-east until it struck and merged into other roads running north and east of the Pennines. This came to be called (as did other lesser roads) the _Fosse Way_.

A third went more sharply west from the southern districts, and connected them not with the Dee, but with the lower Severn. This track ran from the open highlands of Hampshire through Newbury and the Berkshire Hills to Gloucester, and was called (like other lesser tracks) the _Ermine Street_.

Finally, a fourth went in a great bend from these same highlands up eastward to the coast of the North Sea in East Anglia. This was called in Saxon times the _Icknield Way_.

All these can be traced in their general direction throughout and for most of their length minutely. All were forced to cross the Thames Valley, which so nearly divided the whole of South England from east to west.

Of these four crossings the first in point of interest is that which the _Ermine Street_ makes over the upper Thames at _Cricklade_.

These old roads are of capital importance in the story of England, and though historians have always recognised this there are a number of features about them which have not been sufficiently noted--as, for instance, that armies until perhaps the twelfth century perpetually used them; for the great English roads, though their general track was laid out in pre-historic times, were generally hardened, straightened, and embanked by the Romans in a manner which permitted them to survive right on into the early Middle Ages; and of these four all were so hardened and strengthened, except the Icknield Way. Not one of them is quite complete to-day, but the Ermine Street is perhaps the best preserved. It is a good modern road all the way from Bayden to Gloucester, with the exception of a very slight gap at this village of Cricklade.

It originally crossed the river half-a-mile below Cricklade Bridge, so that the priory which stood on the left bank lay just to the south of the old road. How and when the old bridge at Cricklade fell we have no record, but one of the most important records of the Thames in Anglo-Saxon history is connected with this passage of the river.

The importance of Cricklade as a station upon the upper Thames does not only proceed from its being the crossing place of a great road, it is also the point when the first important tributary stream, the Churn, joins the Thames. Above this junction the Thames nowadays is hardly a stream; and even in the eighteenth century and earlier, before the digging of the Severn and Thames Canal, it must have depended on the weather whether there were any appreciable amount of water in the upper part or not. It would probably be found, if records could be examined, that the mills at Somerford Keynes were not continually worked throughout the year, even when the supply of water had been left undiminished by modern engineering. But when once the Churn (which, as we have seen, has a larger volume of water than the Thames) had fallen in at Cricklade the two formed a true river, with depth in it always sufficient to support a boat, and with a fairly strong stream, as also with a width sufficient for minor traffic; and it is after Cricklade that you get a succession of villages and churches dependent upon the river and standing close to its banks.

But though this piece of hydrography has its importance the chief meaning of Cricklade in history lay in the fact that it was the spot where this Ermine Street on its way from the south country to the Severn Valley got over the Thames, and the village connected with it was entrenched certainly in Roman and probably in pre-Roman times. This entrenchment may still be traced.

The crossing of the Thames by the Icknield Way, unlike the crossing of the Ermine Street at Cricklade, presents a problem.

Cricklade, as we have seen, is a perfectly well-established site, and we owe our certitude upon the matter to the fact that the Romans had hardened and straightened what was probably an old British track. But with the crossing of the Icknield Way no such complete certitude exists, for the Icknield Way was but a vague barbarian track, often tortuous in outline, confused by branching ways, and presenting all the features of a savage trail. Doubtless that trail was used during the four hundred years of the high Roman civilisation as a country road, just as the similar trail, known as the "Pilgrims' Way" from Winchester to Canterbury, was used in the same epoch. There are plenty of Roman remains to be found along the track, and there is no doubt that all such roads, even when the State was not at the expense of hardening or straightening them, were in continual use before, as they were in continual use after, the presence of Roman government in this island; but the Icknield Way does not approach the river in a clear and unmistakable manner as would a Roman or a Romanised road. It is on this account that the exact point of its crossing has been debated.

The problem is roughly this: the high and treeless chalk downs have been used from the beginning of human habitation in these islands as the principal highways, and any single traveller or tribe that desired in early times to get from the Hampshire highlands to the east and north of England must have begun by following the ridge of the Berkshire Hills, and by continuing along the dry upland of the Chiltern Hills, which continue this reach beyond the Thames. But the spot at which the pre-historic crossing of the Thames was effected cannot be determined by a simple survey of the place where the Thames cuts through the chalk range. Wallingford up above this gorge has certain claims, both because it was the lowest of the continually practicable fords upon the river, and because its whole history points to an immemorial antiquity. Higher still, Dorchester, on which every historian of the Thames must dwell as perhaps the most interesting of all the settlements upon the banks of the river, has also been suggested. Just above Dorchester, on the Berkshire side, stands the peculiar isolated twin height which forms so conspicuous a landmark when one gazes over the plain from the summit of the Downs. Such landmarks often helped to trace the old roads. And Dorchester has also an immemorial antiquity--a pre-historic fortification upon the hills above, and fortifications, probably historic, on the Oxford bank below, but Dorchester has no ford.

When all the evidence is weighed it seems more probable that the regular crossing from the Berkshire Hills to the Chilterns was effected at Streatley.

Of this there are several proofs. In the first place, the name of the place suggests the passage of some great way. Place names of this sort are invariably found upon some one of the principal roads of England. In the second place, a lane bearing the traditional name of the Icknield Way can be traced to a point very near the river and the village. Another can be recovered beyond the river. The name would hardly have been so continued--even with considerable gaps--both upon the Oxfordshire and the Berkshire side unless the place of regular crossing had been here.

Within a mile or two of Streatley this lane begins to descend the side of the Berkshire Downs. Just before it falls into the Wantage Road and is lost it has begun to curl round the shoulder of the steep hill; but there is no way of telling at what precise spot it would strike the river upon the Berkshire side, because a thousand years or so of building, cultivation, and other changes have obliterated every trace of it.

Luckily, we have some indication upon the farther bank. A way can then be traced here as a lane (and in the gaps as a right of way, as a path, or sometimes only by its general direction) for some miles on the Oxfordshire side as it approaches Goring and the river coming from the Chilterns. And we know the point at which it strikes the village. This point is at the Sloane Hotel close to the railway; the inn is actually built upon the old road. Beyond the railway the track is continued in the lane which leads on past the schoolhouse to the old ferry, where there was presumably in Roman times a ford. If we accept this track we can conjecture that the vicarage of Streatley, upon the Berkshire bank, stands upon the continuation of the Way, and give the place where the pre-historic road crossed the river with tolerable certitude, though it is, I believe, impossible to recover the half-mile or so which lies between Streatley vicarage and the point where the Wantage Road and the Icknield Way separated upon the hillside above.

If the ford lay here the site was certainly well chosen, just below a group of islands which broadened the stream and made it at once shallower and less swift, acting somewhat as a natural weir above the crossing.

The third crossing place of a great pre-historic road, that of the Watling Street, is believed to correspond with the line of that very ugly suspension bridge which runs from Lambeth to the Horseferry Road in Westminster. This is, according to the most probable conjecture, the place at which the great road which ran from the Straits of Dover to the north-western ports of the island crossed the Thames.

Here, of course, there could be no question of a ford; there can only have been a ferry. Such a ferry existed throughout the Middle Ages and up to the building of Westminster Bridge, and produced a large revenue for the Archbishop of Canterbury. The memory of it is preserved in the name of the street upon the Middlesex shore. The Watling Street is fairly fixed in all its journey from the coast to the Archbishop's palace on the banks of the river. On the Middlesex shore it is lost, but it may be conjectured to have run in a curve somewhere in the neighbourhood of Buckingham Palace up on the higher ground west of the Tybourne, parallel with or perhaps identical with Park Lane until we find it certainly again at the Marble Arch, whence in the form of the Edgware Road it begins a clear track across North-Western England.

As for the Fosse Way, it only just touches the valley of the Thames. It crosses the line of the river in a high embankment a mile or so below its traditional source at Thames head, but above the point where the first water is seen. A small culvert running under that embankment takes the flood water in winter down the hollow, but no longer covers a regular stream.

Besides these four crossings of the old British ways above London Bridge there is the crossing of the Roman Road at Staines, which may or may not represent a passage older than the Roman occupation. We have no proof of its being older. The river is deep, and, unless the broken causeway on the Surrey shore is regarded as the remains of British work, there is no trace of a pre-Roman track in the neighbourhood.

The crossing at Staines was the main bridge over the middle river during the Roman occupation; no other spot on the banks (except London Bridge) is _certainly_ the site of a Roman bridge.

But apart from these there are two unsolved problems in connection with the roads across the Thames Valley in Roman times. The first concerns the passage of the upper Thames south of Eynsham; the second concerns the road which runs south from Bicester and Alchester.

As to the first of these, we know that the plain lying to the north of the Thames between the Cotswolds and the Chilterns was thoroughly occupied. We have also in the Saxon Chronicle a legendary account of the occupation of four Roman towns in this plain by the Saxon invaders. By what avenue did this wealthy and civilised district communicate with the wealthy and civilised south?

It is a question which will probably never be answered. There is no trace remaining of Roman bridges; perhaps nothing was built save of wood.

The obvious short-cut from the Roman town of Eynsham across the Witham peninsula to Abingdon bears no signs of a ford approached by Roman work or of a bridge, nor any record of such things.

As to the second question, the road from Bicester southward runs straight to Dorchester. At Dorchester, as we have seen, there was no ford, though just below it a Roman ferry has been guessed at.

There may have been a country road running down along the left or north bank of the river to the pre-historic crossing place at Goring and Streatley; but if there was, no trace of it remains, save perhaps in the two place names North Stoke and South Stoke.

A barrier has yet another quality in history, and that quality is perhaps the most important of all. In so far as it is an obstacle it is also a means of defence.

All the great rivers of Europe prove this. They are studded with lines of strongholds standing either right upon their banks or close by; and various as is the character of the different great rivers in their physical conformation, few or none have been unable to furnish sites for fortification. For instance, the slow rivers of Northern France, running for the most part through a flat country, were able to afford fortresses for the Gaulish clans in their numerous islands; the origin of Melun and Paris, for instance, was of this kind. The sharp rocks along the Rhone became platforms for castle after castle: Beaucaire, Tarascon, Aries, Avignon, and twenty others all of this sort.

The Thames, curiously enough, forms an exception; it is an exception even in the list of English rivers, most of which can show a certain number of fortifications along their banks.

In the whole course of the great river above London there are but three examples of fortification, or at any rate of fortification directly dependent upon the river. Of these the first, at Lechlade, is conjectural; the second, at Windsor, came quite late in history, and the only one which seems to have been a primeval fortified site was Dorchester.

There were, of course, plenty of towns and castles susceptible of defence. At one time or another every important settlement upon the Thames was capable of resistance: Oxford was walled, Wallingford was a fortress, Abingdon or Reading could be defended. But these were all, so to speak, artificial. The settlement came first, and after the settlement the necessity of guarding it from attack, and it was so guarded, not by natural means, but by human construction. The castle at Oxford, for instance, stood upon a mound of earth raised by human work. The only considerable place in which the river itself suggested defence from the earliest times appears to have been at Dorchester.

The curious importance of Dorchester in the very origins of English history and the still more curious way in which it sinks out of sight for generations, to revive again in the tenth century, is one of the puzzles of the history of the Thames.

It is useless to pursue an archaeological discussion as to the origin of the place, and still more useless to try and determine why, though certainly the most easily defended, it should originally have been the _only_ heavily fortified spot in the whole of the valley. We know that it was Roman: we know that it was a place of pre-historic fortification before the Romans came: we know that a Roman road ran northward towards Bicester from it, and we also know, or at least we can make a very probable guess, that though it was continuously important, and that the interest of early history is continually returning to it, it can never have been large.

Perhaps the best conjecture upon the origin of Dorchester is that the stronghold grew up as an out-lier to the great fort over the river at the top of Sinodun Hill. The exact and regular peninsula between the bend in the Thames and the mouth of the Thames is obviously suited for fortification: the tributary flows just to the east of this peninsula, exactly parallel with the main river beyond, and covers the peninsula not only with a stream on its east flank, but with a marsh at the mouth. One can imagine that the conspicuous heights of the Sinodun Hills were held, from the very beginning of human habitation in this district, as a permanent fortress, into which the neighbouring tribes could retire during war, and one can imagine that when the river was low in summer, and perhaps fordable, the spit of land before it, which formed an exception to the marshes round about, needed to be protected as a sort of bastion beyond the stream. This theory will at least account for the two great ridges of earthwork going from one water to the other and completely cutting off the peninsula, since it is agreed these works are earlier than the Roman invasion. Whatever its origin, the part which Dorchester plays in the early history of England is most remarkable. _

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