arsh 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 ha