Hutton A Tour to the Caves 1970 reprint, in d/jkt; Chevalier Subterranean Climbers1951 in d/jkt; Jim Eyre The Cave Explorers, 1981, in d/jkt; Ford Limestones and Caves of Wales, 1989; Martel Spelunca, Vol. VI, Paris 1905, inscribed copy, modern leather, gilt; and three related. Good to VF (8)