Consists of material gathered and created by Margaret Sallis (Willms) during the course of her time as a Mennonite immigrant to Canada, as well as information about her life created after death. Willms was fluent in German and served for a time as a contact for German prisoners of war who were held in France after WWII ended. These letters form the core of the fonds.
The fonds is organized into three series:
- German POW correspondence
- Personal material
- Biographical material