 While in Egypt he discovered what he believed to be Kadesh Barnea, which was the location of the camp of the children of Israel prior to their entry into the promised land.He was accompanied on this trip by Reverend Allen M. Dulles, the father of Secretary of State John Foster Dulles and CIA Director Allen Dulles.Trumbull was the Lyman Beecher Lecturer at Yale Divinity School in 1888.