This is a very old thread revisited but more info is now available.
You may have this info by now but better you have it twice than not. Assuming I have found the correct Herbert…
https://www.findagrave.com/memorial/92859744/herbert-alphonso-lee?There is a newspaper article related to his visit to England. I don’t have access so can’t post a link. It mentions a daughter and 2 grandchildren but no names.
Daughter may still be living. There is a baptism in the Drouin Collection in Sutton Quebec in 1941 for a daughter. Image on Ancestry if you have access, should also be on familysearch (free). PM sent with name.
There is a marriage of a Herbert Alphonso Lee to Rosamond Miriam Kemp 22 July 1934 in Sutton Quebec. Image on Ancestry and should be on familysearch.
PB