In 1968, he became a member of a band called 691. At the end of the year the band had become Cellophane. The line-up included Hewitson on vocals, Dave Wellington on lead guitar, Michael Hill on bass, Pam Potter on keyboards, and John Van der Ryden on drums. They were managed by Colin Misseldine. In 1969 they recorded and self-produced four tracks at HMV studios for Pye. The songs included a cover of the Arthur Brown psychedelic rock hit, "Fire"; "Mind Patterns", which was written by Hewitson; and "I Can’t Quit Her". The band broke up in 1970. "Fire", backed with "Mind Patterns", was released on Pye 7N-14009. Both "Hey Joe" by Sebastian's Floral Array, and "Fire" by Cellophane, appear on the various artists compilation, "A Day In My Mind's Mind Volume 4".