We keep learning more about Camille David who had the theatre built in 1910-11.
The following was found yesterday at this website...www.shbmsh.org/pages/dictionnaire/sh-dict-b1.html

"Beaudry, Corinne (1876-). À Saint-Marc-sur-Richelieu en 1901.- Née à Belœil.- Fille de Jean-Baptiste Beaudry et de Pierre Guertin.- Elle a épousé Camille David à Saint-Marc-sur-Richelieu en 1901."
Translation:
Beaudry, Corinne (1876-) was living in Saint-Marc-sur-Richelieu in 1901. Born in Beloeil. Daughter of Jean-Baptiste Beaudry and Pierre Guertin. She married Camille David at Saint-Marc-sur-Richelieu in 1901.

I grew up in Beloeil....It's a small world. Robert