Robert Caldwell Stewart
Stewart, Robert Caldwell
November 12, 1931 – February 5, 2007 (aged 75)
Birth place: San Antonio, Texas, USA
Obituary: https://www.genlookups.com/tx/webbbs_config.pl/noframes/read/874 with a more precise date at http://bulletin-archive.kenyon.edu/x2419.html