A notice of the progress of the expedition lately sent out from Liverpool to trade in the Niger: extracted from a private Letter, dated 18th June 1833. South African Quarterly Journal, Cape Colony, v. 2, n. 1, p. 13–15, 1833. DOI: 10.21504/saqj.21.2690. Disponível em: https://journal.ru.ac.za/index.php/saqj/article/view/2690. Acesso em: 20 nov. 2025.