Elijah Brown was one of the several Sandusky residents who enlisted in the Massachusetts 55th regiment in 1863. You can read about the African American men who wanted to enlist in the Union Army during the Civil War in the Sandusky Daily Commercial Register of June 6, 186, which was reprinted online. Most of the men from Sandusky who enlisted in the Massachusetts 55th Infantry served in Company I.
According to Elijah Brown's death certificate, available via Family Search Labs, he was born on December 13, 1844 to Bazil and Mary (Wilson) Brown. He lived at 916 Hancock Street in Sandusky, and his occupation was firefighter. Elijah Brown died on April 3, 1915, and was buried in Section 5 of Oakland Cemetery. A brief article about Sandusky's "Freedom Fighters" is found at the Sandusky History website.