Anderson, J. (1880) “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, 14, pp. 51–89. doi: 10.9750/PSAS.014.51.89.