The O'Farrell Family fonds documents the professional and private life of the O'Farrell Family between 1877 and 1899. The fonds includes 2 ledgers outlining purchases made at the general store owned by the O'Farrell Family in Saint-Malachie, Quebec (1890-1896); 4 diaries written by Mary Bridget O'Farrell concerning the private life of the family (1898-1899); and 1 ledger (tax roll) (1877-1883) documenting taxation in the town of Saint-Malachie. Notes, correspondence, and additional pages can be found throughout the ledgers.

The O’Farrell Family fonds is divided into 2 series:
• F026/A Business records
• F026/B Personal records