"Slavery in West Africa. Portuguese Revelations". Translated from a Pamphlet published last year [1912] by Senhor Jeronimo Paiva de Carvalho, formerly Curator on the Island of Principe. Ed. Anti-Slavery and Aborigines Protection Society....
Panfleto reproduzindo excertos de "Parliamentary Papers: Portuguese Slavery and British Responsibility". Ed. Anti-Slavery and Aborigines Protection Society. London: Offices of the Society, 51, Denison House, 1912.
"Portuguese Slavery and British Responsability. Memorandum adressed to the Right Hon. Sir Edward Grey, K.G., M.P., P.C., etc., His Majesty's Principal Secretary os State for Foreign Affairs". Ed. Anti-Slavery and Aborigines Protecti...