There are two Mullabrack, one Co. Down and one Co. Monaghan

Co. Down, Mullabrack, Civil Parish Tullylish, Poor Law Union town Banbridge

Coolmillish, is Armagh as noted, in the the Civil Parish of Mullaghbrack, the Registrar's District is Markethill, and Armagh is the Poor Law Union town.

A Poor Law Union was located in the named town, all parishes, townlands and villages etc. within a 12 mi. area would be administered to from there. The Poorhouse/Workhouse was usually located in
that town.

www.askaboutireland.ie
The Griffith Valuation, a census substitute ranged from 1846-1872 depending on the county.
Armagh was not until 1864 and Co. Down was in 1863. A bit too far out of the range for the
emigration to New Zealand.

1864:
Samuel Wilson, Parish Mullabrack, Townland Coolmillish, Poor Law Union Armagh
tenant of Earl of Longford
#16 house, outbuilding and land 3 acres 0 roods 30 perches

William Clarke, Parish Tynan, Townland Cavanagarvan, PLU Armagh
tenant of Samuel Wilson
8a Samuel Wilson, house outbuilding and land 38.2.25 (he obviously wants the land not the house)
8b William Clarke - house

#6A, B, C. James Wilson, details as above, but tenant of Reps. Anne Lyne house, outbuildings and land 0.3.7, 12,1,39, 0.2.10

14a James Wilson (sen) house and land, sharing with James Jr. 13.0.30
14b James Wilson (Jr) house and land

#16 Samuel Wilson house, outbuildings and land 14.0.25
#17 Thomas Wilson, house, outbuilding and land 8.3.35
#18 John Wilson, house outbuilding and land 10.1.25

Samuel Wilson, Parish Keady, Townland Tullynamaloge, PLU Armagh
tenant of Jane Simpson
21A house, outbuildings land 1.3.0
21B land 2.3.2

Samuel Wilson, Parish Eglish, Townland Ballybrolly, PLU Armagh
tenant of Mrs. M. Martin
#1 ABC land 5.3.30; house, outbuildings and land 33.1.5 Mill reservoir (Waste) 1.1.20
#6Aa Joshua Wilson house and office from Samuel Wilson

Samuel Wilson, Parish Eglish, Townland Terraskane, PLU Armagh
tenant of Rev. Archibald Harding
#19 land 31.0.25
19a unoccuped house and outbuilding, Samuel would be the landlord

Samuel Wilson, Parish Eglish, Townland Killymaddy, PLU Armagh
tenant of Reps James Ashore

11a John Elliott house and sharing land with Samuel Wilson 1.1.10

16AB Thomas Wilson house outbuilding and land 3.1.0; 7.0.15

There are MORE. You need to figure out how many Samuel Wilson's there are. Usually a person can only live in one house. So there would be probably at least a couple of Samuel's. I would suggest you check the above information for accuracy if interested in keeping it. as my typing and eyes aren't as accurate as it used to be.

I thought it interesting to see the Clarke name, and even if not Mary's parent that maybe how they met if they were from different parishes.

www.genealogy.nationalarchives.ie 1823-1837 for Ireland
However this is not a complete records as parishes are missing from counties and some counties are not there. The Originals are at PRONI, Belfast or National Archives, Dublin.
The only Parish represented in Co. Down was Drumgooland with 9 Wilson's, no Samuel
For Co. Armagh only Parish Shrule and 2 Robert Wilson's.

www.irishtimes.com/ancestors you can see maps and parishes etc. and will see how much is missing

www.census.nationalarchives.ie 1901/1911 Census. Recently added FRAGMENTS from early census 1821-1851 that survived the Four Courts Fire in Dublin in 1922.

www.emeraldancestors.com and www.rootsireland.ie are the two places to look for parish records
which are a bit of a mish mash:

Parish Mullabrack, Armagh, Church of Ireland, no baptisms, marriages 1845-1921
Civil Records marriages 1845-1921
Banbridge, CofI marriages only 1813-1982
Tullylish Presbyterian 1828-1900 for baptisms marriages 1845-1900
Cof I Tullylish marriages 1870-1900
Tullylish Methodist 1886-1900

I can't think of any sources that would fill in those missing years.

www.ipg-web.com + county can be a good resource depending on the county, some better than others.

Hopefully you have posted this on Co. Down as well if necessary. Wilson is such a common name I think you will have to wait for them to contact you. I looked in the british online telephone book are there are over 70 in the Banbridge area of Down and 94 in Armagh and of those 60 in the Markethill area.

On a personal level I'm married to a man whose gr.gr.grandfather left Ireland in 1818, the latest family member left in 1840 and the remaining family even knew they had relations in Canada till we got in touch. We finally did a DNA project that was positive.

Annette Code