Curle, Alexander O. “Description of the Fortifications on Ruberslaw, Roxburghshire, and Notices of Roman Remains Found There”. Proceedings of the Society of Antiquaries of Scotland 39 (November 30, 1905): 219–232. Accessed November 22, 2024. https://journals.socantscot.org/index.php/psas/article/view/6939.