Darwin, Charles. The Principal Works of Charles Darwin. THE ORIGIN OF SPECIES. THE DESCENT OF MAN. New York: John B. Alden, Publisher. 1886. Med. 8vo, two works in one volume; Origin: pp. [viii], 254(last blank), also numbered -; portrait frontispiece, the diagram reproduced in white on black at Page 51, index, glossary; Descent: pp. [iv], [viii](7 plates), 334, also numbered -; a few figures, index; original dark green cloth (slightly worn), titled on spine: DARWIN'S | SELECT [sic] | WORKS. [cf. Freeman] and, lower down, ORIGIN OF SPECIES | [rule] | DESCENT OF MAN; printed in double-column; a very good, sound copy; scarce. New York; John B. Alden; 1886.