Laing, David. “Suggestions for a National Exhibition of Scottish Portraits in Edinburgh, in the Year 1855; Including a Communication on the Subject from Thomas Carlyle”. Proceedings of the Society of Antiquaries of Scotland 1 (November 30, 1855): 284-294. Accessed March 29, 2024. http://journals.socantscot.org/index.php/psas/article/view/3971.