Macdonald, James. “The Origin and Growth of the Tradition ’Ecce Tiber! Ecce Campus Martius!’ As Applied to the Tay and the Inches of Perth”. Proceedings of the Society of Antiquaries of Scotland 33 (November 30, 1899): 116–128. Accessed November 25, 2024. https://journals.socantscot.org/index.php/psas/article/view/6731.