The Reverend Henry Clay Trumbull served as chaplain to the 10th Connecticut Volunteer Regiment from 1862 to 1865 during the American Civil War. During that time he wrote nearly 250 letters to his wife alone (he wrote hundreds more), describing his actions and experiences as he ministered to the soldiers. Along with the letters, he kept detailed diaries and a lengthy journal of a four-month experience in a Confederate prisoner-of-war camp in Columbia, S.C. Trumbull's letters therefore constitute an important collection of primary source research material. Reverend Trumbull provides us with an in-depth portrait of a highly qualified, dedicated and concerned chaplain. Because he exposed himself to the hardships and uncertainties of warfare, he earned the respect, admiration and affection of both officers and enlisted men.