Elphinstone, J.D.H. 1858. Letters from Lord Hailes and the Earl of Buchan relative to a proposed collection of Scottish Portraits, and to the formation of the Society of Antiquaries. Proceedings of the Society of Antiquaries of Scotland. 2, (Nov. 1858), 134–138. DOI:https://doi.org/10.9750/PSAS.002.134.138.