Dear sirs was a couple of my ancesters at the louisvile prision? They were Calvin Graybeal and wILLIAM Graybeal.William was in the 6th n.c. calvary and Calvin was in the 6th or 97th state militti.Calvin was captured at big hill ky on july,30 1863.any help will be appreaciated.I belive that William died at fort delaware.