I have no records other than CSRs below.
You will find his records, Robert Graham Holloway, some 45 cards, in National Archives Microform M331, Compiled Service Records of Confederate General and
Staff Officers and Nonregimental Enlisted Men, Roll 130, Holl-Holm. The first 18 detail his assignments, the remainder are requisition type documents, forage, fuel, etc.
There is another record for a R. G. Holloway, Assistant Surgeon, General Hospital, Montgomery Springs. One card, a Reference Card which states:
"See Manuscript No. 6577, page __________, August 1863. I would believe the Old Army Archivists at the National Archives would be able to
locate this document.