There is an island about 150 miles west of Scotland's North coast called St. Kilda. There is no record of a St. Kilda, but Kilda is a corruption of a Norse word meaning Island. It's difficult to approach the Island. The island is ringed by sheer cliffs and the beach in the only harbor is normally raked by 40 foot waves. About 200 people lived there from about 1500 BC until 1930 - when they asked to be evacuated to the mainland. Until the mid 1800s people there could go 200 years at a stretch without contact with the outside world.

Women of St. Kilda, mid 1800s, Barefooted in a Nordic Climate and dressed Entirely in Spun Wool
The people spoke a form of Gaelic and until the mid 1700s practiced a Druidic relgion. They had five Druidic alters on the Island and a ring of upright stones on a nearby rocky Islet. They built beehive shaped storage houses identical to the ancient Celts. In fact, archeology is difficult because it's sometimes hard to distinguish standing structures built in the 1890s from those built in 1000 BC.
There are no trees on the Island and the salt spray made it necessary to raise oats and barley inside special walled enclosures with specially prepared topsoil - probably with the salt washed out. The people raised sheep and dressed in wool. Sea birds provided another source of food and it was necessary to prove your ability to climb the cliffs and collect eggs before you were allowed to marry. There was plentiful peat for fuel and building materials.
The people didn't use money until the late 1800s when steamers began bringing tourists to see the curious people in the time warp. The population had little immunity to the normal illnesses people suffer.
The full story of these people is given in this excellent Wiki article. Well worth a read. Some great pictures are also in a recent issue of National Geographic. St. Kilda Scotland
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