From the Jewish Encyclopedia, 1906:

Born in 1837; died Jan. 7, 1865; son of Benjamin Hyneman. At the outbreak of the Civil war he enlisted as a volunteer in Company C, Fifth Pennsylvania Cavalry, being mustered in on July 26, 1861. Accompanying his regiment to Virginia in 1862, he served with distinction there, and was promoted sergeant. He was present at the battle of Gettysburg, and took part in that of the Wilderness, but was subsequently taken prisoner during a cavalry raid in the vicinity of Petersburg, Va., June 29, 1864. He owed his capture to acts of heroism—surrendering his horse to a wounded comrade whose beast had been shot under him, and giving his own shoes to a barefooted, wounded fellow soldier. Taken to Andersonville, Ga., he was imprisoned in the stockade there, and within six months died of disease accelerated by insufficient food and by exposure in unsanitary quarters. His remains were taken to Philadelphia for burial.