Anderson, Joseph. “Notes on the Contents of Two Viking Graves in Islay, Discovered by William Campbell, Esq., of Ballinaby; With Notices of the Burial Customs of the Norse Sea-Kings, As Recorded in the Sagas and Illustrated by Their Grave Mounds in Norway and in Scotland”. Proceedings of the Society of Antiquaries of Scotland, vol. 14, Nov. 1880, pp. 51-89, doi:10.9750/PSAS.014.51.89.