Doreholm, an islet of Northmaven parish, Shetland, on the N side of St Magnus Bay, 1½ mile ESE of the south-western extremity of Northmaven mainland. It rises rockily and massively from the water, and is pierced by a natural arch or tunnel, 54 feet high, lighted by an opening at the top, and permitting boatmen to fish under it.

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