Seil

Seil (; , ) is one of the Slate Islands, located on the east side of the Firth of Lorn, southwest of Oban, in Scotland. Seil has been linked to the mainland by bridge since the late 18th century.

The origins of the island's name are unclear and probably pre-Gaelic. It was a part of the kingdom of Dalriada in the 7th century but by the 16th century, Seil seemed to have been primarily agricultural in nature. It became part of the estates of the Breadalbane family and in the early 18th century they began to exploit the rich potential of the Neoproterozoic slate beds. The excavations from the island's quarries were exported all over the world during the course of the next two centuries. Today, the economy is largely dependent on agriculture and tourism.