I am trying to find the cause of death for 3 members of the Harkey family of Mertzon. What unsual circumstance could have caused the death of a mother and two daughters? Any information concerning this family will be greatly appreciated.

Listing from the Mertzon cemetery.
Harkey, Mordine 8-29-1916 4-1-1951 Wife
Harkey, Carolyn 8-14-1942 4-1-1951 Dau of B. F. & M.
Harkey, Nancy Ruth 12-28-1947 4-1-1951 Daughter
Thank you,
Doris