Gail,
I believe you may want to post your query at the site dealing with the "Grosse-Ile" that is in the middle of the St-Lawrence River (landing place of immigrants from
Europe). This Grosse-Ile was settled strictly by
English and Acadian French residents, and there is no street nor shop which you have described located there. Nor was there ever a
Coleman family at the Magdalen Islands. Hope this helps, Dennis