This third volume, in what is referred to as a trilogy of Hendrix archive releases covering 2010's Valleys of Neptune and 2013's People, Hell and Angels, is once again a pick'n'mix of unreleased studio works in progress, outtakes and odd session jams. The album's underlying blues thread is established from the get go by a propulsive, Band of Gypsys' take on Muddy Water's ‘Mannish Boy’, with a muscular new arrangement but lacking the necessary guitar solo it deserves, followed by a short sharp blues revamp of ‘Lover Man’. But the real standout here is an absolutely breathtaking Experience studio version of ‘Hear My Train A Comin’' from April 1969 that is worth the price of admission alone. This pulverising eight-minute slow blues pounds all previous versions to dust as Hendrix entwines the menacing vocal and guitar lines with his distortion pedal on max before unleashing one of his most edgy, explosive studio solos ever. Layer upon layer of sheer raw imagination, elastic finger technique and outer-worldly sound pouring forth like Coltrane's ‘sheets of sound’, before calming the fire into delicate, curling jazz figures. ‘Jungle’ is a short jazz-ish instrumental which, like much here, could have been built into something better; the addition of electric sitar makes for an interesting alternate take of the instrumental ‘Cherokee Mist’, while the sessions with Stephen Stills hold little of interest, unless you cannot live without Hendrix playing bass on Joni Mitchell's ‘Woodstock’. Guitar Slim's ‘Things I Used To Do’ with Johnny Winter playing fine bottleneck is an agreeable blues, but better is the slow ‘Georgia Blues’ with Hendrix's T-Bone Walker influences rubbing up against Lonnie Youngblood's robust vocals and sax. In this 50th anniversary year of the guitarist's formidable Electric Ladyland album, and upcoming jazz projects based around its music, it begs the question why the Hendrix Estate/Sony haven't assembled a collection of his jazz related sessions. For starters, there's ‘It's So Bad' and the phenomenal 21-minute ‘Young/Hendrix’ with organist Larry Young; an edit of the studio jam with John McLaughlin and Dave Holland; the superb ‘Easy Blues’ with Holland, Buddy Miles and a hot mystery guitarist, and the jazzy jam with an unknown pianist and trumpeter. And no, it's not Mr Davis, Hendrix died before that recording could happen.