Alas I think it needs more, heres what I dug out, starting with Ros Davies Co Down website
http://freepages.genealogy.rootsweb.ancestry.com/~rosdavies/Ballycross Donaghadee 15:57/80 a small townland 2km NW of Donaghadee; 83 acres: click here to see its location on a townland map; means ' townland of the cross' meaning crossroads; its ancient name was Ballenocross; contains a hill which is 135 above sea level; in 1659 there were 10 Scots/ English & 0 Catholic families here ; owned by Eliza Lowry in 1863 V17 p124 & V7 p45 OSM;SP; PNNI V2 p 181; GV I ask the question why Ballyblack
Miss Mary Ann FULTON Donaghadee & Newtownards of Ballycopeland; daughter of William Fulton (a farmer); married Thomas McGilton of Ballycopeland 21 Nov 1870 at Ballyblack Presbyterian Church, witnesses were James Gunning & Ann McGilton ; mother of James b. 1871 PR; CR
Her parish maps show how Ballyblack townland is on the extreme east side of Newtownards civil parish and it adjoins the civil parish of Donaghadee, but the townland of Ballycross is more northerly and touches the Bangor civil parish boundary.
Methodist Church in Mount St., Donaghadee town across from Church of Ireland. A local tradition claims that the Methodists, converted by John Wesley on some of his many recorded visits to Donaghadee, constructed their place of worship on the site of his open air pulpit near the Parish Church. In 1836 this church was described as neat inside and capable of holding 300 people .The minister in 1843 was Rev. James Tobias and in 1863 Rev. Robert Hazleton. There was a National School adjacent in 1863. The minister in 1910 was Rev. J.W. Carrothers. North of Ireland FHS (
www.nifs.org) has baptisms 1825-1921 & marriages 1839-1921; graveyard separate; gravestones UHF Vol 17 References; V7 p 47 OSM; POD; GIC; GV ; POD
Then I looked at 1901 census which changes Sister in law back to Sister
27 in Mount Street (Ballycross, Down)
MacGowan Thomas William 50 Brother Methodist Co Down Sub Postmaster Married, but to whom. MacGowan John Charles 61 Male Head of Family Methodist-Co Down. Clerk of Petty Sessions Not Married MacGowan Louisa Jane 43 Female Sister Methodist born Armagh City No Occupation Married. That born Co Armagh is the clue.
I don’t know where you got the [Louisa Jane MacGowan] Fulton in the 1911 typed version, I didn’t read Fulton anywhere on the census entry
In 1863 there are no MacGowan listed in Ballycross, unless they are very poor. indeed there are only 3 homesteads. Eliza Lowry, James MCMAHON and Luke CROTHERS see
http://www.askaboutireland.ie/griffith-valuation/index. But there is a MacGowan living in Mount Street
Family Name 1 MACGOWAN
Forename 1 JOHN C.
Townland DONAGHADEE, TOWNPARKS OF
Place Name MOUNT STREET Surely we are getting veryclose
Family Name 1 FULTON
Forename 1 SAMUEL
Parish DONAGHADEE
Townland BALLYCOPELAND
Family Name 1 FULTON
Forename 1 JOHN
Parish DONAGHADEE
Townland BALLYFRENIS
Family Name 1 FULTON
Forename 1 WILLIAM
Parish DONAGHADEE
Townland BALLYCOPELAND
The great thing about Griffiths website is it often gives a map reference. Where if you are lucky the boundary of each homestead is outlined on a map
There is McGowan John born 1838 father George Down in
www.ancestryireland website
I have not searched Familysearch.com The MacGowan, McGowan entries, and the Fulton
I have not searched
www.emeraldancestry website
Maybe others will step in to help you
Good luck JimG