When I was nineteen years old and playing the Hammond B-3 organ in a band called the Salvation Navy, we shared the bill with the Yard Birds. A skinny kid in burgundy lame pants and tie-dyed tank top walks onto the stage with his guitar and violin bow. He subsequently went on to blow our minds with his incredible virtuosity and a vision of what was to come. His name was Jimmy Page and he formed a new band the very next year.Led Zeppelin, with its roots...