Winifred married William Bell and is buried in same cemetery as father Patrick.
On 1901 census her birth date is given as 27 Dec 1851 but census are notorious for wrong information.
Did they live on a farm?
Bridget may be buried on it.
As they were Catholic the local church should have a record of Bridget's burial.
The cemetery is maintained by St Joseph's Catholic Church.
1861 census Hullett Huron
THNY
Patrick, Ireland, , 40
Brigit, Upper Canada, 12
Winfort, UC, 8
Bridget is not listed on 1851 census
TAIRNEY
Patrick, 40
Mary, 13, Ireland
Bridget, 2, Canada
Winny, 1, Canada
This census was taken in 1852.