DU CHAILLU, Paul B. A Journey to Ashango-Land: and further Penetration into Equatorial Africa. London: John Murray, 1867. First edition, 8vo (222 x 136mm.) Tipped-in 4pp. a.l.s. by the author to 'My Dear Burton' [Sir Richard], 23 plates (including frontispiece and title-page vignette), folding map to rear, 32.pp publisher's advertisements. (Mild toning, browning to margins of map.) Original purple cloth with gilt design of the plate 'Prisoner in Nchogo' (bumped to extremities, sunning to spine). Note: the letter is addressed to fellow explorer and writer Sir Richard Burton, and is a detailed and affectionate account of du Chaillu's explorations into the interior of West Africa ('I dare hardly hope that I shall reach the Nile…' and having 'succeeded pretty well with photography' he describes the sight of twenty gorillas destroying seventy plantain trees. He also writes of Speke, James Augustus Grant and refutes the notion of a gorilla dance: 'his Gorilla dance is but a fancy of his imagination', and of his hopes of returning to England with various specimens. Provenance: Robert Milnes-Crewe (gift inscription from the author on the front free endpaper dated 1869); The West Horsley Place Collection.