The 88 letters document the transnational Sansoucy - Harpin family as it maintains its Franco-Canadian familial connections while assimilating into American culture. Much of the earlier correspondence from Napoleon Sansoucy and Corinne Harpin, as well as the bulk of the correspondence from Canada, was written by unknown persons, as many of the family members were illiterate. Key family deaths, including Corinne Harpin, Isaac Sansoucy, Adelard Harpin (Father Jourdain Harpin), and Philippe Sansoucy are mentioned. Various marriages, details of professional lives, and important moves are also seen throughout these letters.