This was Led Zeppelin, and Plant in particular, at their most reflective. This wistful folk ballad from Led Zeppelin IV is rumoured to be about Joni Mitchell and Plants musical obsession with her. His vocal is delivered with an airy melancholy alongside Pages gorgeous finger-picking guitar. Its a contemplative breather towards the end of their fourth album and is arguably their finest folk song. The live version here is from Zeps 1975 Earls Court show with Plant looking every inch the golden god he genuinely thought he was at the time.