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. 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.
From William Smith (ed.), Dictionary of Greek and Roman Geography. Text provided under a CC BY-SA license by Perseus Digital Library, http://www.perseus.tufts.edu, with funding from the National Endowment for the Humanities and Tufts University. Data accessed from https://github.com/PerseusDL/canonical-pdlrefwk/ on 17 October 2026.