I don't have a death record for Charles in Quebec; I had mistakenly taken his second marriage date as his date of death.SO the only death record and obituary would be in BC.
A search for marriages of his children using a Quebec-wide marriage database (BMS2000) did not reveal any.THis may be due to the fact that this database contains only catholic marriage.It is not the Quebec Government database (BSQ-M) which contains all marriages, including licences.THe problem is that the latter database does contain de names of the parents, making it difficult to determine who the parents were.
Did Charles and Ada's children get married in Quebec? You might want to check with the Lowell Directory for Montreal to see if the family was still in Montreal in 1950 and every 5 years. Available on internet. I believe that you have to use the alphabetical option.