Zanzibar: a folio of thirteen albumen prints including views of the, Town and Waterfront, a group of prisoners in chains, a blue-toned stereophotograph and a blue-toned portrait of a Masai warrior

Révoil left the army in 1877 to concentrate on exploration, in particular in the Horn of Africa. He was in Zanzibar in 1883, his starting point for an expedition to Somalia (see N. Broc, Dictionnaire illustré des explorateurs franais du XIXe siècle, Paris, 1988, pp.278-81).