author
A little-known early 20th-century historian, this author is best remembered for a detailed study of everyday life in Revolutionary War army camps. Her work looks past famous battles to the food, clothing, health, discipline, and routines of ordinary soldiers.

by Mary Hazel Snuff
Mary Hazel Snuff was an American writer and historian associated with a 1918 master's thesis, A Study of Army Camp Life during American Revolution. Sources available online identify her as a graduate of North-Western College who went on to earn an M.A. in history from the University of Illinois.
Her best-known work explores the daily experience of soldiers in the Continental Army, focusing on practical details like housing, rations, sanitation, recreation, religion, and discipline. The book has remained in circulation through public-domain and audiobook editions, which suggests a lasting niche interest in her careful, ground-level view of the American Revolution.
Some biographical listings also connect her with the later name Mary Hazel Snuff Schneller, but the broader details of her life are not well documented in the sources I could confirm. Because reliable public information appears to be limited, most of what is known today centers on her academic work rather than on a full personal biography.