just posting these for reference while I search for any details on Mary Anne and her familiy...
1911 Census - Mary Anne Parry widow age 77 (c1834), Irish Church born Co. Limerick, daughter Ellen age 28 (c1883) also born Co. Limerick. Mary Anne has noted years married as 35 (c1876) although this is not supposed to be filled in for widows - could mean how long they were married before her husband died - and 11 children born, with 8 still living.
1901 Census - Mary Anne Parry widow age 64 (c1837), Irish Church born Co. Cork, son Daniel age 26 (c1875) and daughter Ellen age 23 (c1877)
different county of birth given on the two census returns - maybe they came from an area on the Cork, Limerick border...
found a birth for Daniel in the right area with his surname as 'Perry', and born 1870, so a little earlier than the age given on the 1901 census would suggest. see this link (the 3rd entry, his first name has been added a an amendment).
District Killmallock, Registrar's District Kilfinane - Co. Limerick (the district actually covers parts of both Cork and Limerick)
Date and place of birth : 3rd April 1870, Glenanair
Name/Sex : [] Male
Father's name and dwelling place : William Perry, Glenanair
Mother's Name : Mary Anne Perry formerly Westropp
Rank or Profession of Father : Land Steward
Informant : Jane Ormston (her mark) nurse, present at birth (she registered 3 births the same day)
When registered : 4th April 1870
Amendment - name 'Daniel' tenth October 1870.
The BMD Index shows a likely marriage for William and Mary in 1856 in Manorhamilton registration district, which is based in Co. Leitrim - Volume 8, page 21. Images for marriage record on the GRO/IrishGenealogy website currently only cover from 1882 onward, but these early marriages will be added in time. You can order a research cert costing €4 for this to see the full details - e.g. date and place of marriage, father's names, occupations, witnesses etc...
There's an extract of the civil marriage record on FamiliySearch - this includes some of the details from the original register entry. see : Marriage William Perry & Mary A. Westropp 28th January 1856
Place of marriage is noted as Drumlease, Leit[rim] - this may be a reference to the parish.
Ages are given as 29 and 21, and fathers as James Perry and Thomas Westropp.
Additional details that a research cert would show are occupations for the groom and fathers, and the possibly for the bride, place of residence for the bride & groom, names of witnesses, plus the name of the church or registry office and name of the minister or registrar.