Boston, Houghton Mifflin and Co., 1924. First Edition. First Impression. A nice copy in the jacket. Front fold with a 30mm tear to the lower end, and one smaller in the middle. Corners chipped, to crease and spine tips. Some dustiness to top of the block and a little bumping to the spine tips. In Bleiler, under imaginary wars and inventions [p75]. In Spectrum [p14]. Illustrations by Heman Fay Jr. [5984, Hyraxia Books].