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'.")