London, Hodder & Stoughton, n.d. . First edition, first impression. Hardback. A very good copy. A mad scientist tale. Hubin . The jacket has some tanning to the spine, a little splitting to the spine and folds. Some fading to the spine. A little foxing and some dustiness. Offsetting to the endpaper. John Bull label, easily removable. [9940, Hyraxia Books].