The 1960s electric blues band The Yardbirds was the premier rock-n-roll incubator, cultivating three of the world's most talented guitarists: Eric Clapton, Jeff Beck, and Jimmy Page. But does anybody recall the name of the man who co-founded the British group and provided lead vocals and harmonica on its killer tracks, among them, "Heart Full of Soul," "For Your Love," and "Shapes of Things"? His name was Keith Relf, born 71 years ago today. He suffered one of the strangest deaths in rock history.