1857. Sedgwick, Adam (1785-1873). Two autograph letters signed to [James] Marshall. Dent [Yorkshire], Oct. 7, 1857; Trinity College [Cambridge], Oct. 31, 1857. 8pp. total. 186 x 113 mm. Light soiling along folds, but very good. Letters with excellent scientific content from one of the founders of modern geology. Sedgwick was..... More