There was a Private Reuben F. Schumpert in the "Sumter Flying Artillery." He enlisted July 6, 1861 at Americus, Georgia -- age 19. He died of typhoid at Manassas Junction, Virginia on September 1st or 2nd, 1861.
My great-grandfather was also in the Sumter Flying Artillery. I have a web-site for the unit at:
<http://www.sumterartillery.com>