148 pp. Foreword by Bernard Darwin. Illustrated with photographic plates, plus figure drawings. 7¼x5, red cloth, spine lettered in gilt. First Edition. Part of the Aldin Series.

Inscribed by the author on the frontispiece, dated in the year of publication in dark ink. Cotton's first book. Jacket design by Cecil Aldin. Murdoch 148; D&M 13050; D&J C22480.