The above postcard featuring a Vili diviner holding a statue and accompanied by two musicians is well known. It’s photographer, Jean François Audema (1864-1921), who joined the French colonial service in 1894, made numerous photos in Gabon, Congo and Tchad between 1894 and 1912. The National Museum of African Art’s Eliot Elisofon Photographic Archives has made these precious time-documents available online here (ca. 150 images). If you wish to learn more about Audema and his photographs: Christraud Geary gives a short assessment of his work held by the Smithsonian in In and Out of Focus: Images from Central Africa, 1885-1960 (London, 2002) and David MacDougall dedicates a chapter to the man in The Corporeal Image: Film, Ethnography and the Senses (Princeton University Press, 2006).