The naturalist on the River Amazon. London: John Murray, 1863.
Two volumes. 8vo. viii, [ii], 351; vi, 423 Separate frontispieces, 7 full-page illustrations plus numerous text illustrations and 1 folding map. Contemporary half-calf and marbled boards; a very nice copy, though without the publisher's advertisements often found in Volume I. $2,500.00
First edition of what Darwin called "the best work on natural travels ever published in England." Bates discovered more than eight thousand new species during an expedition to the Amazon undertaken by him and Wallace to gather facts "towards solving the problem of the origin of species." "During the whole of his sojourn amid the Brazilian forests his speculations were approximating to the theory of natural selection, and upon the publication of the Origin of species he became a staunch and thoroughgoing adherent of the Darwinian hypothesis" (DNB).