The Deep Purple keyboardist and founding member died at the age of 71 from a pulmonary embolism after a long battle with pancreatic cancer in London. The British rocker and composer will be remembered for his contributions to Deep Purple, helping write the lyrics to albums that sold over 100 million copies, including the band's biggest hit, "Smoke on the Water." He also played for Whitesnake and David Gilmour, among others.