Mystery Train (Junior Parker cover) Lyrics

Lyric discussion by JosephWolf 

Cover art for Mystery Train (Junior Parker cover) lyrics by Led Zeppelin

Isn't it a old blues song?

Yes, kind of. It was written by Sam Phillips, head of Sun Records in Memphis, for Little Junior Parker who had a minor R&B hit. Elvis covered it soon after for what is the most definitive version. Many other artists have had a go.