1901 census- Shortallon (all born Derry): Robert Quigley (30), wife Kate (28) & children Hugh (10), Mary (8 yrs.), Cassie (6), Louie (1), Eliza (1).
https://www.census.nationalarchives.ie/pages/1901/Londonderry/Lower_Liberties/Shortallon/1538654/ 1911 census- Shantallow (Kate born Donegal): Robert Quigley (42), wife Kate (42) & children Hugh (20), Mary (18), Cassie (16), Bridget Louisa (14), Lillie (11), Jane Josephine (9), Agnes (7), John Francis.
https://www.census.nationalarchives.ie/pages/1911/Londonderry/Liberties__Lower/Shantallow/604775/ Note- death of Agnes’ next oldest sister.
Derry Journal, 2 May 1975: QUIGLEY- 27th April, 1975 at her residence 7 Greenhaw Tec., Steelstown Road, Jean Josephine (Jenny), daughter of the late Robert and Catherine Quigley, Racecourse Road. R.I.P. Funeral _ to City Cemetery on ...
Derry City Cemetery:
Hugh Quigley, age 66, Racecourse Road Shantallow, born Derry, died 10 Oct.1957, plot M C 73, parents- Robert & Catherine Quigley.
In same plot is Robert Quigley, age 1 yr. 3 mo., Bogslea, born Bogslea, died 19 Sept.1910, parents- Robert & Catherine Quigley.
Birth: Robert James Quigley 19 Apr.1909 Racecourse-
https://www.irishgenealogy.ie/files/civil/birth_returns/births_1909/01613/1646905.pdf Death: Robert James Quigley 19 Sept.1910 Shantallow-
https://www.irishgenealogy.ie/files/civil/deaths_returns/deaths_1910/05412/4512235.pdf Note: 1911 census says there were 9 children but only 8 living so Robert is the deceased child.
Agnes’s birth certificate (1904) lists parents as Robert Quigley & Catherine Ferry. Agnes’ age fits with 1911 census.
Agnes (Quigley) married Michael Lynch in 1930 (certificate lists father as Robert Quigley and her residence as Racecourse). She died 1960 (age fits with birth certificate).
Headstone for Robert & Catherine Quigley gives her death as 17 Aug.1958 age 93. Derry City Cemetery records have same details & lists birthplace as Donegal but list parents as Neil & Susan Ferry.
Death notice also confirms date of death: Derry Standard, 18 Aug.1958: QUIGLEY - August 17, 1958, at her residence, Racecourse Road, Shantallow, Catherine, widow of Robert Quigley R I.P Her remains will be removed to-day (Monday) at 7 pm, to St. Patrick’s ...
Headstone & Cemetery records indicate birth c1865. 1901 census age 28 so born c1873. 1911 census age 42 so born c1869. So, this range is only 8 years (nothing unusual for Ireland at this time period)
I know from extensive research with the cemetery records that there are sometimes error although difficult to say if mistakes came from informant or cemetery staff. Catherine’s husband Robert Quigley died before her so informant for age on death and parents & age in cemetery records could have been one of her children. That person might not have known the correct names for Catherine’s parents or her exact date/year of birth.