Hello,
I would say the Ballymena marriage stands a more than extremely good chance of being your couple. Your couple's names individually are by no means unique, but I would be more inclined to think the combination - as a married couple - would warrant a very good look at the marrying pair.
Ellen/Helen interchange is common (and I see happens in your couple - she is "Ellen" on son Robert's baptism, and" Helen" on daughter Eliza's). And of course, Davison/Davidson are also interchangeable.
This is the Ballymena marriage - the image quality is poor overall:
Registered, District of Ballymena.
Marriage solemnized at Broughshane, Parish of Racavan, County Antrim
Married 1 Feb 1851 after Banns
Moses Davison, Bachelor, Full age, Weaver, of Coreen, father: ?James Davison, Farmer?
Ellen McBride, Spinster, Full age, of Coreen, father: James McBride, Gardner?
Witness: James Irvine, John Petticrew
The couple both signed with their X Mark
Coreen is a Townland in Broughshane There is a James McBride in Coreen, Tithe Applotments 1825.
Have you got a better image of the 1851 marriage? I think his father is James, or is it John? Hers is certainly James.
1) Helen/Ellen died 1878. Registered on SP in Shotts, Helen McBride or Davidson, aged 52. mms Stewart. Looking for her father's name on the death record?
2) Moses remarried in 1880 to Charlotte Murphy. They are on the 1881 Census, with his son Robert by Hellen/Ellen and Charlotte's children by her prior marriage. Who is Moses' father on that marriage?
3) Moses died in a mining accident in 1884. Who is his father on that Death record?
Charlotte
Cheers
AMBLY