Bute, Marquess of. “Notice of a Manuscript of the Latter Part of the Fourteenth Century, Entitled Passio Scotorum Perjuratorum”. Proceedings of the Society of Antiquaries of Scotland 19 (November 30, 1885): 166–192. Accessed May 7, 2024. https://journals.socantscot.org/index.php/psas/article/view/6149.