This fonds consists of McCarthy family correspondence and accounts (1867-1912). Most letters prior to 1900 are between the siblings, but also include correspondence from other individuals regarding payments. The families correspondence provides insight into life in New Brunswick and parts of the United States and reveals how close knit the family was. Their letters deal with a variety of topics, including cholera, education, working in the woods, staple supplies, legal issues, and visits to family members. After 1900, most of the letters are between members of the next generation, especially Patrick McCarthy's children. These letters discuss work in the timber industry, leisure activities, the winter weather, and family news. This fonds also contains records of the families accounts, an inventory of John McCarthy's estate (1892) and a penmanship book belonging to Patrick's brother-in-law, George Smith.