Mackenzie, W. “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, Vol. 61, Nov. 1927, pp. 173-91, doi:10.9750/PSAS.061.173.191.