The lieutenant colonel of the 116th, Thomas
Wildes, wrote a book about the regiment, published after war. While it is a very valuable source, it is very difficult to find. Some libraries have it in their special collections dept., and it occasionally shows up - albeit with a hefty price tag - thru rare book dealers.
A recent book (several years old) entitled The Burning, by John
Heatwole, gives good picture of the 116th's time at
Dayton, Va.