Incidentally , Ms. Mulcahy succeeded G. Richard Thoman , who was brought in from outside after Paul A. Allaire , then Xerox 's chairman , served briefly as C.E.O . '' Anne Mulcahy was an insider who knew the Xerox values and was of the Xerox culture , and I 've seen the Xerox people rally around her , '' said William W. George , professor of management practice at Harvard Business School . ''