Correspondence, field notes, geological and agricultural analyses, catalogue of fossils, manuscript articles of Eugene W. Hilgard, state geologist of Mississippi from 1855 to 1873, and professor of geology and chemistry at the University of Mississippi during that same period. Hilgard's important Report of Geology and Agriculture in Mississippi, 1860, remains a great authority on Mississippi geology. The correspondence includes letters from E. Barksdale, John J. Pettus, and Ridgley C. Powers.