Much of the family correspondence is between Daniel Putnam Brinley and Kathrine Sanger Brinley during the periods that they were apart, especially the period before their marriage in 1904 and during the time that Daniel Putnam Brinley was in the American Expeditionary Forces in France from 1917 to 1919. These intimate, detailed letters discuss their travels and events in their everyday lives. Researchers should note that the Brinleys often addressed each other with nicknames such as "Jock" or "Put" for Daniel Putnam Briley, and "Kat" or "Dee Dee" for Kathrine Sanger Brinley. Also found are transcripts and partial transcripts of some of these letters. Additional family correspondence is between Kathrine Sanger Brinley and her sister Emma Sanger, often called "Gippie", "Gyppie", or "Gip", correspondence with her brother William Sanger, her parents William and Kate, and correspondence between Daniel Putnam Brinley and his mother. Within these letters the family discusses their travels, including the Brinley's extensive travels throughout Europe, and news of acquaintances and events. Also found here are a few of Elizabeth Loder's notes on the family correspondence.