Leitch, Roger. “’Here Chapman Billies Tak Their stand’: A Pilot Study of Scottish Chapmen, Packmen and Pedlars”. Proceedings of the Society of Antiquaries of Scotland 120 (November 30, 1991): 173–188. Accessed April 27, 2024. https://journals.socantscot.org/index.php/psas/article/view/9388.