Sounds like this is definitely your lot, only using the name McWatters in Northern Ireland and Hills has been passed down as Hall. Here's Hugh and Jane's marriage
Date of Marriage 30 Jul 1861
Groom Name hugh MCWATTERS
Bride Name jane HILLS
Church Belfast Civil Registrars Office
Parish Shankill
Civil District Belfast
County Antrim
Surname Firstname Year Fathers Firstname county
MCWATTERS HUGH 1861 JAMES Antrim
HILLS JANE 1861 WILLIAM Antrim
Looks like they also seriously played down their ages in the source you have!!
To find the birth certificate details go to the link in my earlier post and search for McWatters, giving thousands of hits. Then narrow by Place (selecting Co Antrim) and by Event (selecting birth). Finally narrow by First Name, selecting initial R, and you will find Ruby quite easily. You can do the same for all the family members you know to get the info needed to order a birth certificate (name, district, quarter, year, volume and page) and apply online at
http://www.groni.gov.uk/index/order_certificates.htmAlso found this on Margaret's parents
5 Jan 1875
Groom Name thomas ANDERSON
Bride Name martha HENRY
Church Newtown Crommelin Presbyterian Church
Parish Newtown Crommelin
Civil District Ballymena
County Antrim
Surname Firstname Year Fathers Firstname county
HENRY MARTHA 1875 JAMES Antrim
ANDERSON THOMAS 1875 JAMES Antrim
Have you tried the partial 1851 census for Co Antrim? There is a very good transcription on PDF on a recent link posted by OTTO on Rootschat - a massive file, but the best details I've seen online.