I've always included a second wife for Edward May Magruder because the 1921 Yearbook of the American Clan Gregor Society mentioned a second wife named Elizabeth Frances Allen, but I've never been able to find any more information on her.  She's not in any census nor the family graveyard.  Dr. Magruder wrote an extensive autobiography which was included in an ACGS yearbook and there is no mention of her.  I did find that Dr. Magruder's wife, Mary Cole Gregory, had a grandmother named Elizabeth Frances Allen.  I believe she got mixed up somehow, so I am eliminating the second wife from Dr. Magruder.