I assume that you are inquiring about the school called Notre Dame des Victoires.

The Provincial Archives of Alberta does not hold any original archival records from this school, but there is a published history of the Mission (ca. 1988), located in the Reference Library holdings at 971.233 L118m. This book includes some photographs of students (not individually identified). The also book includes a nominal list of students for 1915-1916 and 1916-1917 only. The Provincial Archives does not hold any records concerning anyone who may have attended the school in the 1950s.