John Mayall's 1971 album temporarily welcomed back two now world-famous former members of his band.
Back in 1969 there were bands that played Woodstock more by luck than their stature on the international stage. The Keef Hartley Band was one of them.
In the spring of 1970, the band's fans got a taste of their in-concert sound on disc.
His third UK top ten album in a year proved just how successfully Mayall had taken blues to the British masses.