ROUSSILHE (Henri-Charles-Clément). General Government of French Equatorial Africa. Congo-Oubangui-Sanga hydrographic mission. 1910-1911. Rapport d'ensemble. Paris, Émile Larose, 1913. 2 volumes large in-8, bradel green half cloth, speckled heads, first cover (Modern binding). Unique edition of this report, illustrated with figures in the text and 96 plates outside the text, including 10 fold-out maps and 86 fold-out views or diagrams. This is all that has appeared on this mission, whose aim was to analyse the conditions of navigability and the possibility of establishing ports on the rivers of the Congo basin. Numa Broc, Afrique, p. 297.