By Douglas ForsterReadOasis Step 3(Part 2)

Musically, the song “speeds up like an adrenaline flow,” said Page. “I really wanted to write something that did speed up, and took the adrenaline with it, and would reach a sort of crescendo. That’s why it was a bit tricky to get together in stages.”

The completed song was released on Led Zeppelin IV in November 1971. Atlantic Records, the band’s label, wanted to release the song as a single. But Led Zeppelin refused to release any of their song...