Margaret was the healthy one and would go on to live for more than 70 years. Hazel was not. She suffered from a collapsed lung that prevented her from feeding. She died in Toronto on February 13, 1927, at the age of four days.
There is some conflicting and clearly incorrect information on Hazel’s death record.
It says that she was born on February 16 and died on February 13 (three days before she was born!). It also says that the physician attended her from her birth until February 16 (three days after her death!).
The date of death – February 13 – appears twice on the form. We are assuming that to be correct. But the record also says that she died at the age of one day, meaning she would have been born on February 12. That can’t be correct because we also know – from other records – that Hazel’s twin sister Margaret was born on February 9. so Hazel must have also been born on February 9.
Lindner, Margaret D (Leslie), William and Isabella Masson Campbell of Hastings County Ontario: Their ancestors and descendants, Budgate Press, Ypsilanti, Michigan, 1983, pp 132.
Ancestry.com. Ontario, Canada, Deaths and Deaths Overseas, 1869-1948 [database on-line]. Lehi, UT, USA: Ancestry.com Operations, Inc., 2010. Original data: Archives of Ontario. Registrations of Deaths, 1869-1948 (MS 935, reels 1-694), Archives of Ontario, Toronto, Ontario, Canada. Archives of Ontario. Division Registrar Vital Statistics Records, 1858-1930. MS 940, reels 5-10, 16, 21, 26-27. Archives of Ontario, Toronto, Ontario, Canada.