First printing w/GILT spine lettering. [1931] title/copyright pages not dated, 1931 on 1st page of adverts to rear. Original blind stamped blue cloth, gilt spine lettering, top stain blue. No jacket present. 288pp + 22 numbered pages of ads. Walsh was a prolific writer of mysteries, using the pseudonyms of H. Haverstock Hill, Stephen Maddock, and George M. White. Hubin lists 56 titles published from 1925 to 1951. This, apparently, is his only science fiction title (Bleiler, "The Check-List of Science-Fiction and Fantasy"; Reginald, "Science Fiction and Fantasy Literature: A Check-List, 1700-1974"). It was first published in Hugo Gernsback's "Wonder Stories Quarterly" in 1931 (Vol. 2, No. 4). It is a very rare title, and one of the high points for Australian science-fiction collectors (See Blackford, Ikin, McMullen, "Strange Constellations, A History of Australian Science Fiction"), who describe it as a "dashing space opera".