For their next two albums, Every Good Boy Deserves Favour (1971) - from which Hayward's "The Story in Your Eyes" was taken as a US charting single (No. 23) - and Seventh Sojourn (1972) (which reached No. 1 in the US), the band returned to their signature orchestral sound which, while difficult to reproduce in concert, had become their trademark. The title "Every Good Boy Deserves Favour" was borrowed, tongue-in-cheek, from a mnemonic used to remember the musical notes that form the lines of the treble clef: EGBDF. The opening track "Procession" was the only item composed by all five band members, a fascinating track depicting the "evolution" of music, leading into Hayward's "Story in Your Eyes". Thomas's reflective "Our Guessing Game" and whimsical "Nice To Be Here" offset the deeper drama of Hayward's "You Can Never Go Home", Lodge's "One More Time To Live" and Pinder's "My Song". Edge, the long-standing drummer-poet, started writing lyrics intended to be sung, rather than verses to be spoken - his "After You Came" (1971) featured each of the four lead singers taking a vocal section. Then in 1972, Lodge's songs "Isn't Life Strange?" (No. 13) and "I'm Just a Singer (In a Rock and Roll Band)" (No. 36) were lifted from Seventh Sojourn as charting UK singles. Sojourn also saw Pinder using the new Chamberlin instrument in place of the mellotron and Edge using an electronic drum kit. Pinder's stirring lament "Lost in a Lost World" opened this last "Core Seven" outing, while his sympathetic ode to Timothy Leary "When You're a Free Man", Thomas's romantic "For My Lady", and Hayward's serene "New Horizons" all stood out.  In an interview following the release of Seventh Sojourn, Graeme Edge told Rolling Stone: "We've got two Christians, one Mystic, one Pedantic and one Mess, and we all get on a treat."  By this time, other bands were picking up their work. Pinder's songs "A Simple Game" (1968) and "So Deep Within You" (1969) were successfully covered by the Four Tops, Pinder winning an Ivor Novello Award for "A Simple Game", Elkie Brooks later covered Hayward's "Nights in White Satin". Pinder also appeared on John Lennon's "Imagine" album in 1971, providing additional percussion on "I Don't Wanna Be a Soldier (I Don't Want to Die)". The 1968 to 1972 album sleeves, plus several solo sets up to Ray Thomas's "Hopes, Wishes & Dreams" in 1976, were characterised by striking surreal scenic sleeve artwork (mostly gatefold sleeves) by artist Phil Travers.  In late 1972, a re-issue of the five-year-old "Nights in White Satin" became the Moody Blues' biggest US hit, soaring to number two on the Billboard Hot 100 and becoming a certified million-seller; the song had "bubbled under" the Hot 100 charts on its original release. The song also returned to the UK charts, reaching No. 9, ten places higher than its original release in 1967.

Answer this question "Did they perform with any other artists?" by extracting the answer from the text above.
". Pinder also appeared on John Lennon's "Imagine" album in 1971,