Drummond, J. 1873. Notice of a Highland Powder Horn, having on it the Monogram of Sir George Mackenzie; with some Remarks on Highland Costume. (The Horn, with others of various kinds, was exhibited.). Proceedings of the Society of Antiquaries of Scotland. 9, (Nov. 1873), 503. DOI:https://doi.org/10.9750/PSAS.009.503.