sentences:  Barham became involved in music production in the late 1960s, working with Quintessence.The latter were a Notting Hill-based progressive rock band who, like Harrison, incorporated a Hindu-aligned spiritual message in their music.Barham produced and provided arrangements on the band's first three albums – "In Blissful Company", "Quintessence" and "Dive Deep" – all released on Island Records between 1969 and 1971.