Mackenzie, W MacKay. 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 (November):173-91. https://doi.org/10.9750/PSAS.061.173.191.