ICTIS
ICTIS 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.”
[
R.G.L]