Hi,
My name is Jeanette and I volunteer for Ireland XO.
Took a quick look at the 1901 and 1911 Ireland census for your family.
http://www.census.nationalarchives.ie/pages/1901/Antrim/Raboo/Altilevelly/991246
http://www.census.nationalarchives.ie/pages/1911/Antrim/Raloo/Altilevelly/189720
Sometimes in blended families the mementos transfer sideways to step-children as well as direct to children. You might need to trace each of the children within this blended line to locate descendants who might have the wanted family photographs. I was able to obtain many pictures of my great and 2xgreat grandparents from a second cousin this way.
Also contacting the Minister at The Non-Subscribing Presbyterian Church of Ireland, Raloo might give you a lead to a photo through perhaps the church or other family located in the area. The minister might perhaps be able to put you in contact with Lodge members who might be able to assist either with photo or other information from which to work with.
http://www.nspresbyterian.org/churches/church16/churchdetail.htm
Rev. Dr. J.W. Nelson, B.A., B.D., PhD.
"Drumcorran", 102 Carrickfergus Road, Larne, Co. Antrim, BT40 3JX.
Tel: (028) 28 272600
The minister was located through an article found at http://www.larnetimes.co.uk/news/local/combined-service-at-raloo-church-1-4098472 which you might also find interesting.
Joining the Clan McAllister of America http://www.clanmcalister.org might also give leads from which to locate relatives. They have lines from Canada as well as U.S.
Hope this all helps, Jeanette