During the early and mid-'70s, Wishbone Ash were among England's most popular hard rock acts. The band's sound was rooted in energetic hard rock, with a strong progressive rock influence in their extended compositions, inventive melodic sense, and the epic-scale soloing from their various guitarists (most notably Andy Powell, the group's sole constant member). Despite extensive personnel changes throughout their existence, Wishbone Ash maintained a distinct sound and a prolific longevity that earned them a lasting following. The group's most popular and best-regarded work came...