I am the co-author of Suffered Greatly By Privations. My ancestor, John Hiram Kelton, served in Company H. I am currently doing a revision of my book, but will be entitled Far From Home. I used portions of my ancestor's diary during the Vicksburg campaign, but he did not write anything about their experiences in the Shenandoah Valley in 1864. At the Battle of Piedmont, June 5, 1864, I know men from Company C,D, E, G, H, I represented the regiment. Not sure if my ancestor was there or with Col. Bradford's contingent defending Bristol, VA.
I know in Smith's diary, he mentions a couple of men who were killed during the constant fighting going on in the Shenandoah Valley, but not 100% sure what companies they were in. I know at the Battle of Fisher's Hill, the 39th TN was placed at the extreme left of the line and when Gen. Crook launched his attack on their flank, McFarland's command was caught completely by surprise and were routed easily by the Federals.