William Moody was the son of Smith Moody and the grandson of Jacob Smith Moody. He was a noted guide. He served in the Civil War in the 96th Regiment as a private for three years, from December 1861 to April 1865.
Source: Mary MacKenzie, The Plains of Abraham: A History of North Elba & Lake Placid, Lee Manchester, ed., Utica, NY: Nicholas K. Burn Publishing, 2007, pp. 84 - 94. Full text here