I found Susan's son Samuel going to Canada:
30 Mar.1924 "Metagama" arrived St. John New Brunswick from Belfast Northern Ireland, Samuel Nelson, age 18, single, [can't quite read occupation]. born Banbridge, Church of England, going to settle permanently, to uncle W. Creighton 125 Bayswater Avenue Ottawa, mother Mrs Nelson Fedney Garvaghy Banbridge.
The outward passenger record of him leaving the U.K. gives occupation as mechanic and address as 10 Pandora St. Belfast.
Added- found Susan's brother William Creighton in Ottawa if you are interested