Anderson, Joseph. 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 (November):51-89.