Hollows, a ruined Border tower in Canonbie parish, SE Dumfriesshire, on the right side of the Esk, 2 miles NNW of Canonbie village. Occupying a site of great natnral beauty, it is 60 feet long, 46 wide, and 70 high; has round turrets at two of its angles; and was the stronghold of the notorious freebooter, Johnnie Armstrong of Gilnockie.—Ord. Sur., sh. 11, 1863.

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