Paton, N. 1887. Notes on Clach-na-Bratach, the Stone of the Standard, now Deposited on Loan in the Museum by Alasdair Stewart Robertson of Strowan. Proceedings of the Society of Antiquaries of Scotland. 21, (Nov. 1887), 226-236. DOI:https://doi.org/10.9750/PSAS.021.226.236.