Wight, again, to which the name Ictis or Vectis would seem to point,
can never have been tidal at this date. But Thanet undoubtedly was
so in mediaeval times, and may well have been so for ages, while its
nearness to the Continent would recommend it to the Gallic merchants.
Indeed Pytheas himself probably selected it on this account for his
new emporium.

D. 3.--In his day, as we have seen, the tin reached this destination
by sea; but in the time of the later traveller Posidonius[18] it came
in wagons, probably by that track along the North Downs now known as
the "Pilgrims' Way." The chalk furnished a dry and open road, much
easier than the swamps and forests of the lower ground. Further
west the route seems to have been _via_ Launceston, Exeter, Honiton,
Ilchester, Salisbury, Winchester, and Alton; an ancient track often
traceable, and to be seen almost in its original condition near
"Alfred's Tower," in Somerset, where it is known as "The Hardway."
And this long land transit argues a considerable degree of political
solidarity throughout the south of the island. The tale of Posidonius
is confirmed by Caesar's statement that tin reached Kent "from the
interior," _i.e._ by land. It was obtained at first from the streams
of Dartmoor and Cornwall, where abundant traces of ancient washings
are visible, and afterwards by mining, as now. And when smelted it
was made up into those peculiar ingots which still meet the eye in
Cornwall, and whose shape seems never to have varied from the
earliest times. Posidonius, who visited Cornwall, compares them to
knuckle-bones[19] [Greek: astrhagaloi]

D. 4.--The vessels which thus coasted from the Land's End to the South
Foreland are described as on the pattern of coracles, a very light
frame-work covered with hides. It seems almost incredible that
sea-going craft could have been thus constructed; yet not only is
there overwhelming testimony to the fact throughout the whole history
of Roman Britain, but such boats are still in use on the wild rollers
which beat upon the west coast of Ireland, and are found able to live
in seas which would be fatal to anything more rigidly built. For the
surf boats in use at Madras a similar principle is adopted, not a nail
entering into their construction. They can thus face breakers which
would crush an ordinary boat to pieces. This method of ship-building
was common all along the northern coast of Europe for ages.[20] Nor
were these coracles only use