HUME, John R. Firing quill from the Duke of Cumberland’s Bastion, Fort George. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 121, p. 423–425, 1992. DOI: 10.9750/PSAS.121.423.425. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/9416. Acesso em: 19 apr. 2024.