Talbot's works are out of print. The right have been acquired by a Gen. Association in RI I believe. IT is made of several volumes but generally bound in 5 vol. There is a set for the counties of Bellechasse-Montmagny-L'Islet.
Another one for the counties of Dorchester-Beauce and Frontenac.
Using BMS2000, I cannot find a marriage record for Regis Roy. However, I do find marriage records for three sons of Joseph and Catherine.
I have access to Talbot's works at my Gen. Society and I will have a look to find out if Regis got married.
Joseph son of Etienne Roy and Marie-Louise Guillemette, married Catherine Fradet-Fradette-Fredette (d/o Clemet Fradet and Catherine Morin, on 26 Oct 1830 at St-Gervais.