Dheirrig or Eilean Dearg (Gael. 'red island'), an islet of Inverchaolain parish, Argyllshire, the furthest of a small group in the mouth of Loch Riddon, at the elbow of the Kyles of Bute, 2½ miles NW of Colintraive. It is crowned by ruins of a fort, erected by Archibald, ninth Earl of Argyll, in 1685, during his disastrous expedition from the Netherlands.

(F.H. Groome, Ordnance Gazetteer of Scotland (1882-4); © 2004 Gazetteer for Scotland)