From 1944, Murray was entrusted to proofread drafts and manuscripts of The Lord of the Rings. Several letters from Tolkien to Father Murray were published The Letters of J.R.R. Tolkien (letters 142, 156, 209)
During the Tolkien Centenary Conference in Oxford (1992), Father Murray gave a sermon preach at the Thanksgiving service (reprinted as "J.R.R. Tolkien and the Art of the Parable" in Tolkien: A Celebration: Collected Writings on a Literary Legacy).