Dirk, Welcome to the list I found this in the United States Social Security Death index. Social Security Death Index: U.S., Individual: Knox, Sara Social Security #: 333-34-3310 Issued in: Illinois Birth date: 22 Feb 1939 Death date: 6 Apr 1999 ZIP Code of last known residence: 53210 Location associated with this ZIP Code: Milwaukee, Wisconsin Nothing else to report Richard