Here we go again. That Zep’s “Nobody’s Fault But Mine” is lifted from Johnson’s tune of the same name is hardly a deep secret. (I knew it myself but had forgotten until I finished a piece on the Johnson covers album and happened to play No Quarter, where the arrangement is the most blatantly derivative of the blues-gospel original). As always, it’s a mixed public-material message — Johnson “borrowed” a bunch of the lyrics from commonplace Christian homilies. But it’s plainly the same tune and that Johnson gets zilch is damned wrong. Even more so because he has no estate that I know of. The frickin’ royalties from that one cut alone could bankroll a little museum devoted to him in Texas.