New York: Atheneum, 1968. First edition. Signed by Watson on title-page. 8vo. (ii), xvi, 226, (12) pp. With black and white illustrations. Publisher's blue cloth, stamped in blind and in silver, cocked; top edge stained yellow; red endpapers; ownership signatures on front free endpaper; in original unclipped dust-jacket, wear at spine ends and along top panel edge, spine slightly faded.

A near-fine copy.