xxii, 531, + 4 ad pp. Illustrated with wood-engraved plates and in text illustrations, including folding frontispiece of a gorilla; large folding map at rear. (8vo) 9¼x5¾, original pebbled blue cloth, title and image of gorilla in gilt on spine, blind stamped figure of an indigenous warrior on front. First American Edition.

Explorations in west central Africa with important early observations of the gorilla.