Ian Stewart
Ian Andrew Robert Stewart
British keyboardist (born 18 July 1938, Pittenweem, Fife, Scotland – died 12 December 1985, London, England) and co-founder of [a20991]. He was dismissed from the line-up in May 1963 but he remained as road manager and contributed piano, organ, marimbas and percussion to all Rolling Stones albums released between 1964 and 1986.
http://en.wikipedia.org/wiki/Ian_Stewart_%28musician%29