Here are some observations which may help.

As a member of the 34th Mississippi, GS was almost certainly captured on the slopes of Lookout Mountain during the morning of Nov. 24, 1863. This regiment had been placed on picket duty along Walthall's left, pickets aligned from Lookout Creek up the slopes to the rock palisades. If I recall, Geary's Division of Hooker's XII Army Corps crossed Lookout Creek well beyond the last picket post, forming line of battle as best they could among the rocks and trees. When the advance began, pickets of the 34th Mississippi not captured immediately were swept north towards to point of the mountain. In addition to the rocks and trees, mists shrouded the slopes to limit vision to a matter of feet. Soldiers could hear much more than they could see. In most cases, Mississippians found the enemy above them on the slopes and tried to scramble over the rocks to better positions.

Picket posts can still be seen in the rocks along the east face of Lookout Mountain.

Survivors did make it back to Missionary Ridge the following day, but almost all the casualties suffered by this regiment would have been absorbed on the slopes of Lookout Mountain. When processing large numbers of prisoners captured on different days and places, Federal rolls often contain clerical errors like the ones mentioned.