Hello Christopher...
EDIT: More than likely a red herring sorry. See below. But I'll leave up the original postI'm assuming that the following LDS link relates to the correct Ellen/Helen/Nellie CRAIG
If I'm wrong just ignore the rest of the post :-)
LDS - 1890 Birth of Ellen CRAIG
https://familysearch.org/pal:/MM9.1.1/FBD6-56RBut I think I'm right because you said that Ellen and James were twins and the following link for James CRAIG has the same Vol/Page number as the previous link
LDS - 1890 Birth of James CRAIG
https://familysearch.org/pal:/MM9.1.1/FBD6-56Y----------------------------------------
EDIT: This next bit is the red herring bit...Have you eliminated the following 1906 marriage of Ellen CRAIG registered in Larne.
Name - Ellen CRAIG
Record Type - Marriages
Registration District - Larne
Year/quarter - Jan to Mar 1906
Volume No. - 1
Page No. - 681
LDS - 1906 Marriage of Ellen CRAIG
https://familysearch.org/pal:/MM9.1.1/FYDS-724I am a bit wary as she would have just turned 15. But as Ellen is no longer listed with her parents and sibling in the 1911 census it sort of makes sense to look at Larne marriages from 1904-ish to 1912. And this is the only one which sticks out.
By matching the above register details on LDS it looks like the only names on Page 681 of Volume 1 are James BALMER, Robert IRVINE and Agnes DUNLOP. No sign of a Francis NEWELL.
But this 1906 Larne marriage shouldn't be eliminated until you sight the register entry. (I think a photocopy of the entry costs about €4.00. I've not dealt with the Irish GRO but I'm sure the Irish rootschat board can advise.)
You may think it's a waste of €4.00 when the groom is more likely than not to be either James BALMER or Robert IRVINE. But if the bride's parents are James and Mary and the bride's age is 16-ish then you can add an Ellen BALMER/IRVINE to the mix.
LDS - 1906 Marriage of James BALMER
https://familysearch.org/pal:/MM9.1.1/FYDS-G4WLDS - 1906 Marriage of Robert IRVINE
https://familysearch.org/pal:/MM9.1.1/FYD9-Z2SLDS - 1906 Marriage of Agnes DUNLOP
https://familysearch.org/pal:/MM9.1.1/FYDS-TJF1901 census of Ireland
http://www.census.nationalarchives.ie/pages/1901/Antrim/Ardclinis/Highlandstown/993367/1911 census of Ireland
http://www.census.nationalarchives.ie/pages/1911/Antrim/Ardclinis/Highlandtown/193484/EDIT...a few days later :-)The 1911 census has a Robert and Ellen IRVINE who have been married for 5 years and live in Ballyvaddy, Antrim. This might be the Ballyvaddy a dozen or so miles north of Larne, so well within the Larne registration district.
More than likely this is the couple who married in 1906. And as the age of this Ellen is 28 it's looks as though the 1906 marriage is another red herring
1911 census - Robert and Ellen CRAIG (married 5 years - tick "Show All Information" box)
http://www.census.nationalarchives.ie/pages/1911/Antrim/Glencloy/Ballyvaddy/194234/And this is more likely than not the other couple on page 681 of the marriage register...
1911 census - James and Agnes BALMER (married 5 years)
http://www.census.nationalarchives.ie/pages/1911/Antrim/Glenarm/Mark_Street/194041/Regards
Beg