Every artist has that one moment where they go beyond the threshold of what they can do. As much as they like the idea of audiences eating out of the palm of their hand whenever they make a new record, there’s always more to explore in rock and roll when you set your mind to incorporating different genres into the mix. Although Led Zeppelin never liked the idea of being tied to one genre, they would always have the blues to come back to whenever Jimmy Page or Robert Plant got lost.

Then again, some of their legacy is wrapped up in more than a few lawsuits. Despite them being one of the titans of all things rock and roll, there are pieces of their catalogue that might not have been all theirs, having been either lifted from another blues legend or turned inside out and becoming unrecognisably stolen wholesale from one of their contemporaries, like Jake Holmes’s version of ‘Dazed and Confused’.

When working on those first albums, though, Robert Plant was still finding his voice as a frontman and a songwriter. There would be those handful of songs that pointed the way forward to something different like ‘Thank You’ and ‘What Is and What Should Never Be’, but seeing them in action back in the day was like watching them through an incubation chamber while they started moulding different pieces together.

And while Led Zeppelin III looked like it was going to be a trainwreck judging by the bonkers cover art, this was the kind of revelation that not many people realised the band was capable of. They had been doing some of their best work on electric guitars, and while ‘Babe I’m Gonna Leave You’ pointed towards a record like this, the unplugged nature of tunes like ‘That’s the Way’ helped showcase their singer-songwriter side a lot better as if Plant was channelling the genius of Joni Mitchell rather than Bob Dylan.