in Britain, mentioned by Diodorus Siculus (5.22) as an island lying off the coast of the tin districts, and, at low tides, becoming a peninsula, whither the tin was conveyed in waggons. St. Michael's Mount
is the suggested locality for Ictis. [p. 2.13]
Probably, however, there is a confusion between the Isle of Wight, the Isle of Portland, the Scilly Isles, and the isle just mentioned; since the name is suspiciously like Vectis,
the physical conditions being different.
This view is confirmed by the text of Pliny (4.30
), who writes, “Timaeus historicus a Britannia introrsus sex dierum
navigatione abesse dicit insulam Mictim in qua candidum plumbum proveniat;
ad eam Britannos vitilibus navigiis corio circumsutis navigare.”