I belatedly saw your post. The original letters were destroyed in a house fire in the early 20th Century, but some family member had fortunately transcribed them before their destruction. Typescripts of the letters are located at Emory University, Atlanta, and in the Southern Historical Collection, University of North Carolina. Copies of the letters, omitting much of the personal information, were published as J. L. Austen, ed., General John Bratton: Sumter to Appomattox in Letters to His Wife. Suwannee, Tenn.: Proctor's Hall Press, 2003. Thre are some gaps in the chronology of the war when Bratton was absent due to furloughs of indulgence or wounds, but the collection is very useful for his brigade of the First Corps. There is a large volume of personal and family information editied out of the published work, but the orject of the editor was to focus on the military aspects of Bratton's career. I have compared the published version with the typescripts, and it appears to me that Austen did a commendable job of editing, and his commentary makes the collection ahng together. I'm sure you can get a copy of Austen's book at the Library of Congress.

Lee