The info provided by another person from Drouin's marriage dictionary appears correct although difficult to decipher or chart given the up and down approach all the time. I prefer to go in the upward position starting with the most current generation.
BMS2000 shows the marriage date of Barthelemy as 18 Jun 1838 vs 1831. I would have to validate this with the actual records at St-Vallier.
I had the same children for Barth and Adelaide.
With regard to ancestry past the generation of Joseph and Marie-Anne Coulombe, I will have to check a source of data at my Gen. Society. Jetté's work has good info about the early generations in New France. Also, Talbot Work contains ready-made genealogies of the families of the Counties of Bellechasse-Montmagny-L'Islet; that means that all the generations for your ancestry are probably there. I could check this out for you. Neither of those two works are avail. on the web to my knowledge.
Have you considered using BMS2000 (avail. in English and French) on the web. About 8 cents per positive query. Easy to use.
For couples, search can be made with surnames only.
Can also search for children of a couple:
In right upper corner, in ROLE IN THE ACT, click onGROOM'S PARENTS FOR THE SONS OF THIS COUPLE AND ON BRIDE'S PARENTS FOR THE DAUGHTERS OF THIS COUPLE. This is a time-saving approach.
One of my ancestor was married in St-Vallier about 1765. It is a beautiful area that I visit every year.
More to come soon.