from 1994:
http://www.washingtonpost.com/wp-dyn/content/article/2008/01/08/AR2008010803378.html
Williams Is Assistant to Both the Clintons
Power of First Lady’s Chief of Staff Exceeds That of Her Predecessors
By Ruth Marcus
Washington Post Staff Writer
Friday, August 5, 1994; Page A08
Thanks for the additional info.