Laing, David. “Notice of the Death of Robert Blackader, Archbishop of Glasgow, During a Pilgrimage to the Holy Land, in the Year 1508”. Proceedings of the Society of Antiquaries of Scotland 2 (November 30, 1858): 222–226. Accessed November 22, 2024. https://journals.socantscot.org/index.php/psas/article/view/4424.