For the first 17 years of their history, the only official live album was , which had its virtues -- especially as it captured elements of their harder, more ambitious repertoire -- but also left more casual fans rather cold, owing to the absence of any of their biggest hits. helped solve that problem, including as it did a concert version of and also adding a legendary concert piece -- their rendition of 's mid-'60s -era classic -- to ' official discography. The release was extremely popular but it also revealed the reason why had not made it onto the prior live album, which was principally a matter of 's boredom with a song not his own that he'd performed too many times by 1970, and also owing to the fact that the band had done about 90 percent of everything they were going to do with the song in its original album version; is at his most inspired and involved on the that he interjects during the break, and everything else is an elaboration of the extended jam originally heard on the studio recording. [ was later combined with and in the two-CD set.] ~ Bruce Eder