Right from the first time we went to America in 1968, Led Zeppelin was a word-of-mouth thing. You can't really compare it to how it is today.

But to put out a greatest hits on one CD was totally impossible, I just couldn't do it. The best compromise was to put out two CDs - Early Days - which is what it is - and Latter Days.

Everything that came later... the roots are all there in the first album.

No. I usually rest in my satin-lined coffin, actually. I'm not allowed out in daylight hours.

I always felt if we were going in to do an album, there should already be a lot of structure already made up so we could get on with that and see what else happened.

There's so much that can be done on the guitar. And that's what is so good about the guitar - everyone can really enjoy themselves on it and have a good time, which is what it's all about.

There's a certain standard in classical music that allows the application of the term "genius," but you're treading on thin ice if you start applying it to rock & rollers.