SIMPSON, Frank G. Roman Signal Stations on the East Coast. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 60, p. 227, 1926. DOI: 10.9750/PSAS.060.227. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/7670. Acesso em: 6 may. 2024.