You will want to refer to the Samuel Hollingworth Stout Papers, 1837 (1860-1865) 1902, Center for American History, University of Texas at Austin. OCLC Record No. 34197007.

Box 2G282. Camp Kingston Hospital, B.W. Avent, Surgeon Papers.
Box 2G386. Barnsville, Georgia, Kingston Hospital, G.W. McDale, Surgeon.
Box 2G394. Kingston, Georgia. Erwin Hospital, J. Grones, Surgeon.

Kingston Hospital. Thomas Mattingly, Surgeon.
Box 2G403. Opelika, Alabama. Kingston Hospital, J.L. Thompson, Surgeon.
Box 2.325/AA31. Camp Kingston Hospital. B.W. Avent, Surgeon Papers.
Box 2.325/AA32. Barnsville, Georgia. Kingston Hospital, G.W. McDade, Surgeon.
Box 2.325/0D16(L1). Kingston Hospital.

You will want to also refer to Kate Cumming's "The Journal of Kate Cumming, A Confederate Nurse, 1862-1865." She was a nurse at a number of Army of Tennessee Hospitals but one of them were the Kingston Hospitals.

I hope this helps.

Respectfully,

Gerald D. Hodge, Jr
War Between the States Historian
Historian: 39th Georgia Volunteer Infantry Regiment