Henry Clay Trumbull (1830-1903) was a noted author, editor, and Sunday-school missionary. In 1852, Trumbull joined the church and became the superintendent of a mission Sunday-school, continuing to work at the railroad. After working at several different jobs, in 1858 he became the state Sunday-school missionary for Connecticut.
Trumbull was ordained in 1862 and became the chaplain of the 10th Connecticut Regiment, stationed in North Carolina. He was held by the Confederates for four months in 1863, and after his release served in Virginia until his discharge in August 1865.
He then became New England secretary for the American Sunday-school Union. In 1875, he and his family moved to Philadelphia where he became editor of the Sunday School Times. Trumbull was the Lyman Beecher Lecturer at Yale Divinity School in 1888.
During his life, Trumbull wrote thirty-three books, including Kadesh-Barnea, about a historic site he identified in Palestine, and probably the most read today The Blood Covenant. I have several of his books on our Online Books page.