Mann, L.M. 1908. Notices (1) of a Pottery Churn from the Island of Coll, with Remarks on Hebridean Pottery; and (2) of a Workshop for Flint Implements in Wigtownshire. Proceedings of the Society of Antiquaries of Scotland. 42, (Nov. 1908), 326–329. DOI:https://doi.org/10.9750/PSAS.042.326.329.