The group's fourth album, and their final one for Vanguard, showed them mildly progressing within the strictures of the blues format, although in large measure this was more of the same second-division white Chicago blues.

There were some slight funk and soul influences in tunes like "Geronimo" and "Walk in My Mind," the latter of which has a psychedelic tinge both to the spacy lyrics and the wavering wordless vocal-harmonica effects heard at the end of the verses.

The two live cuts, particularly "Angel Food Cake," captured their jittery take on the blues better than any of their Vanguard studio recordings.

The most unusual offering, however, is "Song," which breaks out of the usual blues format with a gentle, hippyish rock ballad not far from the territory of the early work of Vanguard labelmates Country Joe & the Fish, complete with inventive electric piano.

Far from being a failed departure, that cut's actually a highlight of this uneven set, which is weighed down by some pedestrian 12-bar blues.