Mackenzie, W.M. 1927. Some Stray Inscriptions - (1) Runes on Standing Stone at Oykell Bridge; (2) on Bracket at Gleneagles; (3) on the Kindrochit Brooch; (4) the Atholl Motto; (5) Two Carved Stones of the Urquharts of Cromarty. Proceedings of the Society of Antiquaries of Scotland. 61, (Nov. 1927), 173–191. DOI:https://doi.org/10.9750/PSAS.061.173.191.