Wikipedia information

When John Mayall was starting another band after the break-up of the Bluesbreakers in May 1969,[4] he decided to have a band that would play "low volume music" – or music without "heavy lead guitar and drums".
The performers on the album were Mayall on vocals, harmonica, a slide and a Fender Telecaster guitar, a tambourine, and mouth percussion, Jon Mark on acoustic guitar, Steve Thompson on bass, and Johnny Almond on tenor and alto saxophones, flutes, and mouth percussion. All the songs on the album were written or co-written by John Mayall. Thompson co-wrote California, Thoughts About Roxanne and Don't Waste My Time.[1] Another track, "I'm Gonna Fight For You, J.B.," is a tribute to the American blues guitarist J. B. Lenoir who died in 1967 and who had a deep influence on Mayall (this was Mayall's second such tribute to the musician; "The Death of J.B. Lenoir" appeared on his earlier Crusade album). Two concerts took place, on 11 and 12 July. All tracks are from the second gig.
The album was produced by John Mayall, who also designed the packaging and was the album's art director. The recording engineer was Eddie Kramer, who had engineered Jimi Hendrix and Led Zeppelin, among others