London, Longman, Brown,Green & Longmans, 1848. First edition, first impression. Hardback. A very good copy. Two volumes, complete. "A group of potholers follow an underground river from Derbyshire until they emerge on the inner surface of the hollow Earth. The inner world is illuminated by its own small sun, lush and strange but edible vegetation is plentiful, and scattered about are fine cities peopled by the spirits, in corporeal form, of the ancient Greeks and Romans. The bulk of the book that follows consists of dialogues between the travelers and such philosophers as Aristotle and Cicero." [Locke, Spectrum I:132]. Cloth a little rubbed and bumped, ownership inscription, collectors plate (Newton Charles Ogle), bindings quite shaken and pulling with the webbing showing at the hinges, a couple of small shop stickers. Some foxing to the first and last leaves. 32pp of ads to volume one, 8pp of ads to volume two. [11894, Hyraxia Books].