remaining trio took on a progressive rock direction and changed the band name to Egg. (They would, however, briefly reunite with Hillage to record an album under the project name of Arzachel, on which each member employed an arcane surname both for fun and to get around contractual problems). Between 1970 and 1971 Egg recorded their debut album and its follow-up The Polite Force. Campbell played bass guitar in the group (as well as singing and adding French horn) and was also its main composer, citing Igor Stravinsky as his main influence. He has, however, subsequently expressed reservations about his later time with the band (saying of The Polite Force, "I didn't enjoy the sessions which seemed to me turgid and unsatisfying. I don't like the album.") All Egg members also played and composed for the Ottawa Music Co., a large ensemble co-led by Dave Stewart and Chris Cutler between 1971 and 1972, which brought together members of Egg, Henry Cow and Khan, along with other composers and instrumentalists. Cutler recalls the ensemble playing Campbell's "Study for Four Keyboards", "Enneagram", and "Three Pieces for Wind Quartet" (and also that Campbell, during the last OMC show, "(swung) across the stage on a rope shouting 'It's a mug's game'.") Persistently struggling to maintain their record deal with Deram, Egg amicably disbanded in 1972. By this time Campbell had become interested in mysticism and was involved in the international spiritual movement Subud. Having unsuccessfully pursued work as a plumber and as a graphic designer, he was invited to compose music for a film by director David Anderson: this in turn led to him attending the Royal College of Music, studying the French horn and composition and gaining his ARCM diploma in 1974. With mixed feelings about his academic studies, he reunited with his former Egg bandmates for their final album The Civil Surface (also in 1974), which consisted of unreleased material written in 1971–72, including what many view as Campbell's masterpiece in the progressive rock canon, Enneagram. The album was bolstered by two Campbell-composed wind quartets (which featured neither Stewart nor Brooks). During this period, Campbell maintained a connection with the Canterbury scene movement of which Egg had been a part, playing and recording as a support musician for Henry Cow, Hatfield & The North, Slapp Happy and others. Following graduation (and after a very brief stint with Alan Gowen's jazz fusion band