James O. Mara (sometimes listed as James O'Mara) is buried at the cemetery of the Ohio Veterans Home in Sandusky, Ohio. While his tombstone states that his military unit was Company E of the 16th Kansas Infantry, Mr. Mara's Civil War Pension record, available at Ancestry Library Edition, lists his two Civil War units as Company B of the Second Battalion of the 18th U.S. Infantry, as well as Company E of the 16th Kansas Cavalry.
James O. Mara died at the Ohio Soldiers' and Sailors' Home on December 26, 1917. He is buried at the Ohio Veterans Home Cemetery. Mr. Mara's obituary, which appeared in the December 27, 1917 issue of the Sandusky Register, reports that he was survived by four children. The article states that James O. Mara was known as "Buckskin Jim" by his comrades at the Veterans Home. It is said that a Native American gave that nickname to James O. Mara when he was a soldier in the western United States many years before.