Harrison Barnum, Co. I, 22nd Mich. Infantry Rgt. applied for a pension on April 18, 1864. His pension certificate number is 32156.

His mother Maria Lord applied for a pension on May 23, 1891 while living in Pennsylvania. Her application number is 513451. There is no pension certificate number so apparently she was not granted a pension.

The pension law was changed in 1890 that expanded eligibility so Maria's application date does not actually help determine Harrison's date of death.

You can order pension records from the National Archieves via the internet. Its a flat fee but I don't rember the cost.