Well, sometimes one needs to stand on one's head to find info

. I think this might be the death of Lexy.
McKenzie, Mrs D (as on the record)
Date of death 12 Apr 1919
Age 83
Residence Dalhousie NS (this is where they were apparently living, if I remember correctly)
Married, housewife
Husband Donald McKenzie
Religion Presbyterian
Buried in Dalhousie Cemetery in Dalhousie NS
Record set District 10, River John, Pictou County
The original record is available to view for free at the Nova Scotia Historical Vital Statistics website.
Still no sign of a death record for Donald. I don't know if there is a contact link for the cemetery to check if Donald might be buried with her.
PB