Is This What You Want? add backing vocals to "Dear Prudence" in late August; he had also joined the backing chorus for "Hey Jude" earlier that month. The songs recorded included "Sour Milk Sea" and "The Eagle Laughs at You", for the A- and B-side of Lomax's debut single on Apple, and "You've Got Me Thinking". Among the guest musicians on the London sessions, much of which would go unused, were Eric Clapton, Ringo Starr, Nicky Hopkins, Klaus Voormann and Paul McCartney. Other participants included drummers Bishop O'Brien and Pete Clark; the former was part of Apple artist James Taylor's backing group, while Clark was
What Wondrous Love Is This Bryan included "What Wondrous Love Is This" in his folk opera "Singin' Billy". In 1958, American composer Samuel Barber composed "Wondrous Love: Variations on a Shape Note Hymn" (Op. 34), a work for organ, for Christ Episcopal Church in Grosse Pointe, Michigan; the church's organist, an associate of Barber's, had requested a piece for the dedication ceremony of the church's new organ. The piece begins with a statement that closely follows the traditional hymn; four variations follow, of which the last is the "longest and most expressive". Dwayne S. Milburn composed a prelude on "Wondrous Love" as the first movement