Searching and not finding

I have looked through all the Drouins for St Ours for the 1810 time frame and have not come across any Michel Mathieu. I did find a Michel Mathieu born in 1810 in Yamaska which is 30 miles from St Ours and one born in 1805 in St Ours. I am hoping to obtain a copy of his death certificate soon so that I can see it for myself to verify dates and who gave the information.