John Mayall is one of the most important figures of the whole blues movement, and had a big impact through the astute use of the musicians he developed in The Bluesbreakers over a number of years, and through his own musicianship, and this atmospheric recording shows from where it stemmed. Throughout the '60s, his band, The Bluesbreakers, acted as a finishing school for the leading British blues-rock musicians of the era. Guitarists Eric Clapton, Peter Green, and Mick Taylor joined his band in a remarkable succession in the mid-'60s, honing their chops with Mayall before going on to join Cream, Fleetwood Mac, and The Rolling Stones, respectively. John McVie and Mick Fleetwood, Jack Bruce, Aynsley Dunbar, Dick Heckstall-Smith, Andy Fraser (of Free), John Almond, and Jon Mark also played and recorded with Mayall for varying lengths of times in the '60s. In America at least, Mayall continued to be pretty popular in the early '70s. His band was no more stable than ever; at various points some American musicians flitted in and out of The Bluesbreakers, including Harvey Mandel, Canned Heat bassist Larry Taylor, and Don "Sugarcane" Harris. Although he's released numerous albums since and remained a prodigiously busy and reasonably popular live act, his post-1970 output generally hasn't matched the quality of his '60s work.