Nelson Mortimer Percy. Born in 1875 in Dexter, Iowa, Nelson Mortimer Percy was a graduate of Rush Medical College in 1899. Dr. Percy was an attending surgeon at Augustana Hospital and at St. Mary's Hospital in Chicago. Lt. Col. Nelson Mortimer Percy was the Surgical Director, U.S. Base Hospital No. 11, from 17 April 1918 to 24 January 1919. SOURCE: History of Medicine and Surgery and Physicians and Surgeons of Chicago. Biographical Publishing Corporation, 1922. p. 746. Copyright status: out of copyright.