Laing, David. “Account of Lieut-Colonel William Mercer. Author of ’Angliae Speculum; Or England’s Looking-Glasse.’ London. 1646”. Proceedings of the Society of Antiquaries of Scotland 3 (November 30, 1862): 341–357. Accessed May 2, 2024. https://journals.socantscot.org/index.php/psas/article/view/4530.