The Leah Catharine Deyo Collection contains the correspondence of Leah Catharine Deyo to her sister-in-law Maria Lefevre Deyo. The letters begin in 1845, when Leah Catharine is in Saratoga Springs taking "the Cure" for consumption. The women continue writing regularly until Leah Catharine's death in 1849. The letters recount the harrowing details of Leah Catharine's battle with consumption as well as her grief over the loss of her two children, possibly to the same disease.
Leah Catharine and Maria Lefevre Deyo also wrote to each other about the mundane aspects of early Victorian family life; farming, child-rearing, sewing and knitting, and fashion.