Cramond, Wm. “Some Notes on Road Bills, With Reference to a Collection of Them, in Three Volumes, Now Exhibited; And Notes on the Casting from Abernethy Iron Works, Now Presented to the Museum”. Proceedings of the Society of Antiquaries of Scotland 31 (November 30, 1897): 224–227. Accessed November 22, 2024. https://journals.socantscot.org/index.php/psas/article/view/6664.