SF Encyclopedia Picture Gallery
Sydney Horler. The Mystery of No. 1 (London: Hodder and Stoughton, 1925) [Paul Vivanti: hb/]
Image courtesy of Spy Guys and Gals
Sydney Horler. The Mystery of No. 1 (London: Hodder and Stoughton, 1925) [Paul Vivanti: hb/]
Image courtesy of Spy Guys and Gals