DARWIN, CHARLES. The Structure and distribution of coral reefs. London: 1842. 8vo, 212 x 132 mm., later cloth. Folding engraved map (hand-colored in outline), two folding plans (one hand-colored). Freeman 271. KKM/HSNY -- DARWIN. Geological observations on the volcanic islands visited during the voyage of H.M.S. Beagle. London: 1844. 8vo, 215 x 130 mm., later cloth, small tear to blank lower margin of title. 1 folding lithographed map. Freeman 272. KKM/HSNY -- DARWIN. Geological observations on South America. London: 1846. 8vo, 213 x 135 mm., later cloth, map torn and crudely repaired with adhesive tape, one plate detached, another creased and torn at outer edge. Folding engraved map, fine lithographed folding plates (one hand-colored). Freeman 273. KKM/HSNY. (3)