The Historic Thames

by Hilaire Belloc

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.