The collection contains records relating to Father Asselin’s religious life, including certificates of baptism and confirmation, memorial cards, and a letter confirming his ordination (in Latin), as well as personal documents like passports, memos, and military certificates.

Many records in the collection testify to Father Asselin’s religious/academic involvement, including a copy of the Spiritual Exercises and his own research and publications on the Exercises, a booklet published by Father Asselin about spirituality, newspaper articles featuring his research, photographs from his lectures, scholastic certificates, and Loyola College mementos and brochures. Abundant correspondence from the 1950s to 1970s—mostly scholastic in nature and having to do with the Spiritual Exercises (which was his speciality), but extending to casual correspondence with friends, colleagues, and family—can also be found in the collection.

A number of photographs and negatives may be found in the collection which depict Father Asselin at a military camp and various religious ceremonies and conferences.

The fonds comprises records that attest to his religious life, including a Latin letter confirming his ordination, invitations to his 50th jubilee, a text published by him pertaining to Catholics in the Eastern Townships, newspaper articles pertaining to his religious career, a copy of Messenger of the Sacred Heart yearbook featuring him from the 1960s, and a typed account of his time at the Spanish Ontario residential school. The collection contains a number of photographs of Father Walsh with other Jesuits and at various events, as well as a school photo from 1917.