Fonds consists of primarily financial and legal records related to property transfers and the estates of members of the Dawes and Leishman families. It includes land sale deeds, court documents, invoices, receipts, and wills. Business and legal affairs of James P. Dawes, his wife Elizabeth Leishman, and their son Albert F. Dawes are represented in the fonds. Business deals associated with James P. Dawes include with Grand Trunk Railway Company of Canada. Many legal documents in the fonds are related to land holdings and property in Lachine, Quebec.