In 1968, he formed the band
Brainbox with
Jan Akkerman and
Cyril Havermans. He and Akkerman were also in the 60s group
Johnny and the Cellar Rockets together. When
Colin Allen left Focus, Pierre briefly rejoined the group in 1975 for live dates and an unreleased track, "Glider", subsequently on the "Ship of Memories" LP. He toured and recorded with Jan Akkerman on Jan's solo album "Eli" in 1976, and on "Floatin'" on Akkerman's eponymous 1977 release. He also recorded with jazz keyboardist
Jasper van 't Hof and with band Sweet'd Buster's "Out of the Blue" in 1980. He also recorded in a trio with organist Herbert Noord and tenor saxophonist Rinus Groeneveld, and rated the album
Dare to Be Different as one that he was particularly proud to play on. == Influence and technique ==