[2] The stone was used as a floor slab at the castle and was removed in 1819 to the collection of Sir Walter Scott at Abbotsford House grid reference NT506342 where it resided until it was donated to the Society of Antiquaries of Scotland in 1924.

[2] The slab is carved on both faces in relief and, as it bears Pictish symbols, it falls into John Romilly Allen and Joseph Anderson's classification system as a class II stone.

[6] The lower two thirds of the face holds a second horseman and a variety of other animals, including a bull.

[9] This close proximity, and the similarity with the Class II slabs at Aberlemno has long been noted and it has been suggested that the stone originated there.

[2] Historian Ross Trench-Jellicoe has postulated, based on similarity of design and execution, an Aberlemno School of Pictish Sculpture, originating from Iona.