I originally wanted to put "Stairway To Heaven" as song of the day but it felt a little too obvious of a choice for Led Zeppelin. Kashmir is almost like a don't give up story for me. Page had the chords for this song for years, but just felt like something was missing. When John Paul Jones was late for recording sessions Jimmy Page would work on it with drummer John Bonham. John Paul then added his bits to it the song after most of it was already completed.