Philadelphia: George W. Jacobs, 1916. In a remainder issue binding bearing the A.L. Burt spine imprint. Light green cloth lettered in green. 418 pp + frontispiece illustration. Xmas, 1919, ink gift inscription on front free endpaper; spine faintly yellowed; else a VG clean and tight copy. Hubin p. 205. WWI thriller novel involving a German submarine.; Octavo.