Recheck suppose her birth was not 1862, for whatever reason, and one error is within one record eg if she was 16 not 21, heres an interesting possible
From
http://www.ancestryireland.com/WARD MARY 1867 father WILLIAM Ward Down
Street Directories are useful if fully indexed, some are for Belfast only etc
My hunt for William Ward tailor took me thru the census 1901 and 1911 where there are a few but wrong ages also tailoring might mean drapers and hosiers & shirt manufacturers so nearest clues
In 1861 street directory.
http://www.lennonwylie.co.uk/alphanames1861RtoY.htmWard, Joseph, hosier, 15 Castle Street.
In 1901 street directory
http://www.lennonwylie.co.uk/alphanames1901WXYZ.htmthere is Ward & Co., drapers and hosiers & shirt manufacturers, 68, 70 Old Lodge Road
You mentioned Kilbroney that opened up the search mentioned
http://freepages.genealogy.rootsweb.ancestry.com/~rosdavies/SURNAMEShas two sections for Ward including about 100 entries for Kilbroney
Consider contacting Larry Price direct who has researched some of these by using his email listed under interests/forum within Ros davies website
William Ward births might include one of these
Thomas WARD . Kilbroney husband of Ellen ? ; father of William bapt. 15 Apr 1840 (sponsors were John Rooney & Ann Russel) at Kilbroney Catholic Church; PR
Peter WARD . Kilbroney married Widow Anne Ward 21 Dec 1819 at Kilbroney Catholic Church; witnesses were Patrick Murphy & Francis Horan ; father of William bapt. 28 Aug 1821 (sponsors were Richard Ward & Ann Murphy) at Kilbroney Catholic Church PR
For Hosier records in Ireland, at first sight very scarce
From
http://pilot.familysearch.org/recordsearch/ there are
Name: Mary Catherine Hosier
Registration District: Kilkeel
Event Type: BIRTHS
Registration Quarter and Year: Jul - Sep 1885
Name: John Hosier
Registration District: Dundalk
Event Type: BIRTHS
Name: Hosier
Gender: Female
Birth Date: 29 Sep 1879
Birthplace: Dublin, Dublin, Ireland
Father's Name: Thomas Hosier
Mother's Name: Kate Hosier
On emeraldancestors.com There is a 1916 marriage of an Ernest Hosier in Co Londonderry ope that moves you on
Now that’s all I can conjure up, hoping that moves you on a bit