Enhallow, an island of Rousay parish, Orkney, in the sound between the SW side of Rousay island and the Evie district of Pomona. It measures about a mile in circumference, has good soil, and is overlooked by the headlands and hills of Rousay and Pomona. The strait between it and Rousay is beset by a reef of rocks, covered at high water, and very dangerous to unwary mariners. That between it and Pomona bears the name of Enhallow Sound; offers but little width of fair way to vessels; is swept by a rapid tide; and ought never to be attempted except in moderate weather, and with a fair wind.

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