J. Anderson, “Notice of a Sculptured Stone with Ogham Inscription, from Latheron, presented to the National Museum by Sir Francis Tress Barry, Bart., M.P. Hon. F.S.A. Scot., Keiss Castle, Caithness; and of Two Sculptured Stones, recently discovered by Rev. D. Macrae, B.D., at Edderton, Ross-shire”, PSAS, vol. 38, pp. 534–541, Nov. 1904.