Some food for thought…
1912 passenger arrivals (image on ancestry).
Jeanie Allison 25 married, destiation London Ontario, going to husband (no name given but has possible occupation an Iron + something worker?), Presbyterian.
And Helen age 2 - doesn’t match ages given later but…
The two arrived St John New Brunswick 06 Feb 1912 which would have given Jeanie just about enough time to travel to London by train to marry David Allison on the 9th of Feb as a single woman.
This looks like David in the 1911 census indexed as Albinson (courtesy of Library and Archives Canada). He is living with his brother Alexander and all are apparently living with Alexander’s in-laws. Alexander’s marriage cert (1909 Ontario) has his name as Allison and parents appear to match those of David in his later marriage.
The key word here is that David is working in a foundry in 1911 which would potentially match the iron + something stated on the above passenger list.
https://central.bac-lac.gc.ca/.item/?id=e002001470&app=census1911&op=imgSo, did Jeanie say she was married to make it easier for her to come to Canada? Or is this someone else? Anyway, food for thought.
PB