From History of Licking County, Biographical Sketches by Township, Monroe Township: Barnum, T. M., wagon-maker, post office, Johnstown, was born in Johnstown, Licking county, Ohio, February 2, 1840. Enlisted in the fifth Iowa Volunteer Infantry in Marshalltown, Iowa, June 8, 1861, and served four years and forty days; was discharged at Nashville, Tennessee, August, 1865. Was married January 20, 1870, to Delia Kasson, of Monroe township, Licking County, Ohio. Has three children: Byron, born February 14, 1871; Harry, born September 7, 1874; May, born April 7, 1878. Mr. Barnum is a Democrat in politics, and is a member of Johnstown Lodge, No. 422, Independent Order Odd Fellows.
According to Veterans Administration records, he was a private in Company "I", 5th Iowa Cavalry, and received a pension as an Army Invalid. His widow received a pension as an Army Widow.