London: Duckworth & Co., 1917. 1st edition (Bleiler, p. 130; Danielson, p. 47; Locke I, p. 147). 190,  pp. One page advert follows text. Crown 8vo. Original publisher's pale blue paper-wrapped boards, with black lettering. Printed white paper dust jacket. Sunning to binding. Paper age-toned, as is always the case. Bookplate. Very Good. Dust jacket with wear & soiling, spine panel somewhat sun-tanned, Very Good. Item #46522
Per Locke, "Science fantasy short novel of sudden hostility towards man of a certain section of the animal kingdom. Something of a predeccsor to Daphne du Maurier's 'The Birds'."