Antoninus, Wall of, a turf entrenchment, about 20 feet high, with an outer ditch, raised in 140 A.D. by Lollius Urbicus. the Roman Legate in Britain. It started from Douglas Castle, on the Clyde, and ran to Caer Ridden Kirk, on the Forth, a distance of some 36 miles. Though always known by the name of Antoninus, this work, in point of fact, did but serve to connect the series of forts constructed by Agricola sixty years before. The line may now be traced in parts, and is called locally Grime's Dyke, or Graham's Dyke, Grim being the appellation of the devil.