Ewart, Gordon, Jon Triscott, N M McQ Holmes, D Caldwell, H Stewart, F McCormick, T Holden, and C Mills. 1997. “Archaeological Excavations at Castle Sween, Knapdale, Argyll & Bute, 1989-90”. Proceedings of the Society of Antiquaries of Scotland 126 (November):517-57. https://doi.org/10.9750/PSAS.126.517.557.