Wallace’s Stone

Wallace’s stone is situated at Blairston Mains, the 1st non-private left turn on the B7024 to Maybole after leaving Alloway.
The stone is surrounded by a solid stane wall in a strip of trees.
The carving is suggested as a representation of Wallace’s sword but looks more like a cross to me, however some interpretation is required.
Canmore ID 41595 (go to Links) has more information on this site, suggesting the carving is “a cross in false relief” dating from the “10th to 12th century”.