[5][6] As well as being the saxophonist and the band leader being of The Revels, he was also a both a member and manager of another surf rock act, The Sentinals.
In 1989 and at the age of 50, he was working as an Amtrak ticket agent He had his own 200-acre ranch near King City in central California.
[15] Along with The Revels, Knowles provided music for the Kent Mackenzie directed 1961 film, The Exiles which was about Native Americans living in Los Angeles.
[16] Years later he recalled some of the tracks they recorded for the film which included "It's Party Time" and possibly "Revellion".
[25] Along with Sam Eddy and Tony Hilder, Knowles worked with Bob Irwin of Sundazed to aid in the 1994 release of Intoxica!
[30] Among the musicians that have been influenced by Knowles is Bill Swanson, sax player for surf band, The Eliminators.
[31] Not long before The Impacts, a Del-Fi act had their California surf hit "Latin’ia", Knowles offered to manage them.
[33] By 1963, Knowles was managing The Sentinals, who at that time, according to the San Lus Obispo Telegram-Tribune were fast becoming as big a draw as the Four Seasons in the Valley area.
[35][6] In the late 1990s, the Bacchus Archives record label got in touch with him about the Surf Teens' album he produced in 1963.
The album was released on the budget Sutton label and was distributed by the rack jobbers at their usual outlets.