Lynne didn't really know Zep when we met but after a while she agreed with me that this *might* be their best work. (Though there's a lot of competition, I know...)
"Since I've Been Loving You" is an outstanding piece of work, maj, so long as you don't care about the 1968 Moby Grape song that they totally ripped it off! :-)
Quite right too! One of my personal favourites is Lemon Song from the second album, which Zep completely stole, but made SO much better than the original.