Mandeville Barker graduated from Hobart College in 1913, and was ordained an Episcopal Priest. He was rector of the Episcopal Church in Uniontown, Pennsylvania, before going to France in 1917 as a member of the Y.M.C.A. He was subsequently attached to the 108th Machine Gun Battalion and the 110th Infantry Regiment as a civilian chaplain. The story was told that once two soldiers of the 110th were lost in a cave for 48 hours. Reverent Barker gave a movie entertainment in the mouth of this cavern and while it was underway, the two soldiers saw the lights and thus found their way out.



