A second file in his name has a card which reveals,

he died of wounds Sep 1, 1864 received at New Hope Church, Ga.

I suspect he was wounded May 25 -26 at the Battle of New Hope Church, Ga. Subsequently he was hospitalized at nearby Marietta or, soon after at Atlanta. Recovering, he was discharged and on his way to rejoin his unit where he died at Griffin, Ga. September 1