FORBES, Alex P. Some Account of Robert Watson, with reference to a Portrait of him, painted by Proessor Vogel Von Vogelstein, now presented to the Museum. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 7, p. 324–334, 1867. DOI: 10.9750/PSAS.007.324.334. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/5338. Acesso em: 3 may. 2024.