It's hard to argue with this two-fer issued by the fine Beat Goes On label from Great Britain, as it pairs two of former Traffic guitarist Dave Mason's finest records on a single disc. Alone Together featured the hit "Only You Know and I Know," as well as "Shouldn't Have Took More Than You Gave," and "Look at You, Look at Me." Headkeeper contains "Pearly Queen," his solo version of "Headkeeper," "Feelin' Alright?," and "World in Changes." What these discs most reveal is just how deep Mason's roots went into R&B, soul, and into country as well. If anything, Mason would have been right at home on a Delaney & Bonnie record as his sensibilities were closely allied with theirs. Mason was always underrated and, in America at least, under-noticed. These records are as fine as anything Eric Clapton ever issued solo. The comparison is fair because they were both digging into the same territory at the time, only Mason's delivery and understated guitar playing come off as far more emotionally honest.

This whole album was an afterthought – Procol Harum had been invited to play a concert with the Edmonton Symphony Orchestra and the Da Camera Singers in Edmonton, Alberta, Canada, in August of 1971, at the tail-end of their last tour with Robin Trower in the lineup. Amid all of the preparation – including the writing of new orchestral arrangements by Gary Brooker and with a new lead guitarist, Dave Ball, just joining the lineup – Brooker decided that it might be a good idea to preserve a professionally made tape of the show and suggested that A&M Records, to which they were signed, might want to record the performance; the label agreed with just a week to go until the concert.

Listen to this collection, put together to capitalize on the explosive growth in the group's audience after Aqualung, and it's easy to understand just how fine a group Jethro Tull was in the early '70s. Most of the songs, apart from a few heavily played album tracks ("Song for Jeffrey," etc.) and a pair of live tracks from a 1970 Carnegie Hall show, came off of singles and EPs that, apart from the title song, were scarcely known in America, and it's all so solid that it needs no apology or explanation. Not only was Ian Anderson writing solid songs every time out, but the group's rhythm section was about the best in progressive rock's pop division. Along with any of the group's first five albums, this collection is seminal and essential to any Tull collection, and the only compilation by the group that is a must-own disc.

Recorded in 1972, Blue Moses, the most commercially successful album in pianist/composer Randy Weston's catalog remains one of his most controversial due to his conflicted feelings about the final product, which he feels is too polished and too far from his original intent for the project. Indeed, appearing on Creed Taylor's CTI imprint was an almost certain guarantee of polished production. Weston plays both acoustic and Rhodes piano here; he was backed by a band of CTI's star-studded stable: trumpeter Freddie Hubbard, tenor saxophonist Grover Washington, flutists Hubert Laws and Romeo Penque, drummer Billy Cobham, alternate bassists Ron Carter and Bill Wood, and percussionists Phil Kraus, Airto Moreira, and Weston's son Azzedin…

Originally, this collection was put together in 1972 by Tony Stratton-Smith from outtakes of the Nice's early stay at Immediate Records, and issued (at least, in the U.S.) with no explanation and little annotation, making it a bit confusing to longtime fans of Keith Emerson and the trio. Its timing was also unfortunate, in that a huge cache of record club copies of the Nice's first three albums on Immediate, pressed by Columbia Special Products, had shown up in cut-out bins at just about the same time. One had to listen closely to see that everything here was an alternate take of material from the band's first two albums. Essentially, Autumn 1967/ Spring 1968 (aka Autumn to Spring) was an outtake version of the group's debut long-player, The Thoughts of Emerlist Davjack, shorn of the two longest tracks from that album, "Rondo" and "War and Peace"…

Drawing on rock, salsa, and jazz, Santana recorded one imaginative, unpredictable gem after another during the 1970s. But Caravanserai is daring even by Santana's high standards. Carlos Santana was obviously very hip to jazz fusion - something the innovative guitarist provides a generous dose of on the largely instrumental Caravanserai. Whether its approach is jazz-rock or simply rock, this album is consistently inspired and quite adventurous. Full of heartfelt, introspective guitar solos, it lacks the immediacy of Santana or Abraxas. Like the type of jazz that influenced it, this pearl (which marked the beginning of keyboardist/composer Tom Coster's highly beneficial membership in the band) requires a number of listenings in order to be absorbed and fully appreciated. But make no mistake: this is one of Santana's finest accomplishments.

A monster album, the one that put them back in the spotlight and signaled that Norman Whitfield had saved the day. Damon Harris had replaced Eddie Kendricks, and there were many doubters convinced the band was finished. Instead, Whitfield revitalized them via the majestic single, "Papa Was a Rollin' Stone." Despite its length, Whitfield's decision to open with an extensive, multi-layered musical suite and tease listeners was a master stroke. By the time Dennis Edwards' voice came rushing in, no one would dare turn it off. The single, as well as "Law of the Land" and others, ended the funeral arrangements that had been prepared for the Temptations. The album was included in the book 1001 Albums You Must Hear Before You Die.

Foxtrot is where Genesis began to pull all of its varied inspirations into a cohesive sound - which doesn't necessarily mean that the album is streamlined, for this is a group that always was grandiose even when they were cohesive, or even when they rocked, which they truly do for the first time here. Indeed, the startling thing about the opening "Watcher of the Skies" is that it's the first time that Genesis attacked like a rock band, playing with a visceral power. There's might and majesty here, and it, along with "Get 'Em Out by Friday," is the truest sign that Genesis has grown muscle without abandoning the whimsy. Certainly, they've rarely sounded as fantastical or odd as they do on the epic 22-minute closer "Supper's Ready," a nearly side-long suite that remains one of the group's signature moments…

Hard Attack by Dust is an improvement over the acceptable performance of the self-titled debut from the year before. The team of producer Kenny Kerner and vocalist/guitarist/producer Richie Wise do just what the title suggests, bringing a harder attack to songs like "Pull Away/So Many Times" and "Ivory," the latter an instrumental with emphasis on guitar riffs and cymbal work. It's an all-out assault from the trio and pretty interesting, though the album as a whole works better when Thog's Fred Singer adds piano and organ. "How Many Horses" benefits from keyboard presence, and brings the group back to the Leslie West/Mountain flavors so obvious on the group's 1971 debut. That song definitely sounds like Dust was intent on remaking the Jack Bruce/Mountain classic "Theme From an Imaginary Western," one of that group's highlights…