“Notices of Teampull Michael, Keallun, North Uist, and of Sculptured Stones in Bearnarey, Harris, and in Benbecula; an ‘Abrach’ Quern, and Quarry for Querns, Heisgeir, North Uist. &c”, PSAS, vol. 8, pp. 276–286, Nov. 1871, doi: 10.9750/PSAS.008.276.286.