Ice Age (The last one, 20,000 years ago.) - Got as far as North Bryher and North Tresco. In these areas there is sandstone from Southern Ireland and Flint from St Georges Channel.
Ictis - Latin name for St Michael's Mount in Cornwall.
Illiswilgig - Islet (Large rock) in the Norrad Rocks. See also named rocks.
Inner Head/Monk's Cowl - Southwest Peninnis Head.
Innis - Cornish for 'island' i.e. Peninnis
Innisidgen (St Mary's) - Name said to derive from Enys-au-geon (St. John's Island) SY921 127
Innisidgen Hill (St Mary's) - Behind the the island of the same name.
Innisidgen Entrance Graves - Lower: SV 9211, 1271 & Upper (Higher): SV 9220, 1265.
Insula Santi Sampsonis - Sampson c.1150?
Interregnum - Plural interregna or interregnums, is a period of discontinuity or "gap" in a government. In Scilly it mainly applies to the Civil War period c. 1642 - 1660. It could also apply when the Godolphin family gave up the lease of the islands c. 1826, to 1833, when it was taken over by Mr Augustus Smith.
Invererne - An iron clad sailing ship of 743 tons. Built in 1865 at Port Glasgow for Francis Banfield & Son, she was originally called Anne Laity Banfield until sold in 1872. Further information [snt 21p19].
Inundation, The - Great Storm of 1744, caused major flooding to Hugh Town.
Iron Age - 700-400AD.
Izzicumpucca - Cavern west of Big Jolly Rock, Peninnis.
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