Gentlemen,
There are a large amount of Stout Papers at Emory University in Atlanta, Georgia. The family broke the papers up years ago and sold them off in chunks. As a result, they are located in different archives/libraries, and I think some are still in private hands. I hope this helps.
Respectfully,
Gerald D. Hodge, Jr.
War Between the States Historian
Historian: 39th Georgia Volunteer Infantry Regiment
http://39thgavolinfrgt.homestead.com/39thHomepage.html
Warner Robins, Georgia