Hi do you have any further information about this Edward. I see an Edward n St Sylvester then married to Matilda McKee in 1867.in 1891 they are still in the area in Quebec and have children, Edward, Ida and Susie and Amy. It looks as though they may have moved to Massachusetts a little later.
I can send more specific links if you need them. Hope this helps but with out a little more info its hard to confirm if its the right person...although there are not a lot of Edward Montgomery's at this stage in Quebec! Good luck!