Hi,
Welcome to RootsChat
What was the name of the Uncle and his wife ? There is a border crossing Canada to the USA 19 th May 1921 for an Ernest Mott aged 36 years - carpenter with a wife Annie aged 36 years and 2 children Charles aged 9 years 10 months and Hazel to years 6 months. Father of Ernest was Charles Mott, 51 Kingston Road, Middlesex. They were going to Detroit.
Family had travelled Liverpool to Quebec arriving 19 May 1921.
Would those names ring any bells ?
Sandra