Letters written by Dr. William B. Mann, 1853-1891, discussing family matters; his studies at the Albany Medical College and the University of Buffalo Medical School; his service as an assistant surgeon in the U.S. Navy during the Civil War; and other matters. Also includes, letters of his father Joseph Mann and his aunt, Electra Mann, 1803-1858. Most of the Civil War letters concern Dr. Mann's postings, though one letter dated September 26, 1862, concerns events aboard the US Steamer "Miami" in the North Atlantic Squadron, and a letter from William N. Wells, dated April 24, 1891, concerns Wells' efforts to gain a larger pension because of injuries received on board the "Miami" in 1864.