attack during the journey; it will permit the rapid passage of a large number abreast where the wood tracks and paths of the land compel a long procession; and it furnishes the first of the necessities of life continually as the journey proceeds.

Upon all these accounts a river, during the natural centuries which precede and follow the epochs of high civilisation, is as much more important than the road or the path as, let us say, a railway to-day is more important than a turnpike.

What is equally interesting, when a high civilisation after its little effort begins to decline into one of those long periods of repose into which all such periods of energy do at last decline, the river reassumes its importance. There is a very interesting example of this in the history of France. Before Roman civilisation reached the north of Gaul the Seine and its tributary streams were evidently the chief economic factor in the life of the people: this may be seen in the sites of their strongholds and in the relation of the tribes to one another, as for instance, the dependence of the Parisians upon Sens. The five centuries of active Roman civilisation saw the river replaced by the system of Roman roads; the great artificial track from north to south, for instance, takes on a peculiar importance; but when the end of that period has come, and the energies of the Roman state are beginning to drag, when the money cannot be collected to repair the great highways, and these fall into decay—then the Seine and its tributaries reassume their old importance. Paris, the junction of the various waterways, becomes the capital of a new state, and the influence of its kings leads out upon every side along the river valleys which fall into the main valley of the Seine.

There are but two considerable modifications to the use for habitation of slow and constant rivers: their value is lessened or interrupted by precipitous banks or they are rendered unapproachable by marshes. The first of these causes, for instance, has singularly cut off one from the other the groups of population residing upon the upper and the lower Meuse, as it has also, to quote another example, cut off even in language the upper from the lower Elbe.

From this first species of interruption the Thames is, of course, singularly free. There is no river in England, with the exception of the Trent, whose banks interfere so little with the settlement of men in any place on account of their steepness.

As to the second, the Thames presents a somewhat rare character.

The upper part of the river, which is in lowland valleys the most easily inhabited, and the part in which, once the river is navigable, will be found the largest number of small settlements, is in the case of the Thames the most marshy. From its source to beyond Cricklade the river runs entirely over clay; thenceforward the valley is a flat mass of alluvium, in which the stream swings from one side to the other, and even where it touches higher soil, touches nothing better than the continuation of this clay. In spite, therefore, of the shallowness and narrowness of the upper river there always existed this impediment which an insecure soil would present to the formation of any considerable settlements. The loneliness of the stretch below Kelmscott is due to an original difficulty of this kind, and the one considerable settlement upon the upper river at Lechlade stands upon the only place where firm ground approaches the bank of the river.

This formation endures well below Oxford until one reaches the gap at Sandford, where the stream passes between two beds of gravel which very nearly approach either bank.

Above this point the Thames is everywhere, upon one side or the other, guarded by flat river meadows, which must in early times have been morass; and nowhere were these more difficult of passage than in the last network of streams between Witham Hill and Sandford, to the west of the gravel bank upon which Oxford is built.

Below Sandford, and on all the way to London Bridge, the character of the river in this respect changes. You have everywhere gravel or flinty chalk, with but a narrow bed of alluvial soil, upon either bank to represent the original overflow of the river.

At the crossing places (as we shall see later), notably at Long Wittenham, at Wallingford, at Streatley, at Pangbourne, and, still lower, at Maidenhead and at Ealing, this hard soil came right down to the bank upon either side.

On all this lower half of the Thames marsh was rare, and was to be found even in early times only in isolated patches, which are still clearly defined. These are never found facing each other upon opposite banks of the stream. Thus there was a bad bit on the left bank above Abingdon, but the large marsh below Abingdon, where the Ock came in, was on the right bank, with firm soil opposite it. There was a large bay, as it were, of drowned land on the right bank, from below Reading to a point opposite Shiplake, the last wide morass before the marshes of the tidal portion of the river; and another at the mouth of the Coln, above Staines, on the left bank, which was the last before one came to the mud of the tidal estuary; and even the tidal marshes were fairly firm above London. From Staines eastward down as far as Chelsea the superficial soil upon either side is of gravels, and the long list of ancient inhabited sites upon either bank show how little the overflow of the river interfered with its usefulness to men.

The river, then, from Sandford downward has afforded upon either bank innumerable sites upon which a settlement could be formed. Above Sandford these sites are not to be found indifferently upon either bank, but now on one, now on the other. There is no case on the upper river of two villages facing each other on either side of the stream. But though the soil of this upper part was in general less suited to the establishment of settlements, a certain number of firmer stretches could be found, and advantage was taken of them to build.

There thus arose along the whole course of the Thames from its source to London a series of villages and towns, increasing in importance as the stream deepened and gave greater facilities to traffic, and bound together by the common life of the river. It was their highway, and it is as a highway that it must first be regarded.

Of the way in which the Thames was a necessary great road in early times, perhaps the best proof is the manner in which various parishes manage to get their water front at the expense of a somewhat unnatural shape to their boundaries. Thus Fawley in Buckinghamshire has a curious and interesting arrangement of this sort thrusting down from the hills a tongue of land which ends in a sort of wharfage on the river just opposite Remenham church. In Berkshire there are also several examples of this. On the upper river Dractmoor and Kingston Bagpuise are both very narrow and long, a shape forced upon them by the necessity of having this outlet upon the river in days when the life of a parish was a real one and the village was a true and self-sufficing unit. Next to them Fyfield does the same thing. Lower down, near Wallingford, the parish of Brightwell has added on a similar eccentric edge to the north and east so that it may share in the bank; but perhaps the best example of all in this connection is the curious extension below Reading. Here land which is of no use for human habitation—water meadows continually liable to floods—runs out from the parish northward for a good mile. These lands are separated from the river during the whole of this extension until at last a bend of the stream gives the parish the opportunity it has evidently sought in thus extending its boundaries. On the Oxford bank Standlake and Brighthampton do the same thing upon the Upper Thames and to some extent Eynsham; for when