Re: Captured soldiers to Point Lookout
You could review prisoner of war records for Confederates brought to Point Lookout and sort out those that belonged to the 42nd Mississippi Regt. As an alternative, review service files of this regiment and note those captured at Gettysburg PA. It would be up to you to decide about anyone captured during the retreat, as many of the wounded became prisoners when Federal cavalry raided Confederate trains moving through South Mountain passes.