Moncrieff, William, and John Small. “Account of an Alchemical Roll on Parchment, Presented by the Earl of Cromarty in 1707, to the Royal College of Physicians of Edinburgh”. Proceedings of the Society of Antiquaries of Scotland 11 (November 30, 1876): 561–575. Accessed November 3, 2024. https://journals.socantscot.org/index.php/psas/article/view/5771.