High Quality Content by WIKIPEDIA articles! Ely Samuel Parker (1828 – August 31, 1895), (born Hasanoanda, later known as Donehogawa) was a Seneca attorney, engineer, and tribal diplomat. He was commissioned a lieutenant colonel during the American Civil War, when he served as adjutant to General Ulysses S. Grant. He wrote the final draft of the Confederate surrender terms at Appomattox. Later in his career, Parker rose to the rank of Brevet Brigadier General. President Grant appointed him as Commissioner of Indian Affairs, the first Native American to hold that post.