London, Grant Richards, 1910. First edition, first impression. Hardback. A very good copy. In the rare jacket. Borderline sf featuring a submarine with slightly advanced tech. Illustrated throughout. The jacket has chipping to the top edge and corners, with a little foxing and tanning. A couple of short, closed tears. Prize plate to the front endpaper. A little foxing here and there. [10891, Hyraxia Books].