This letter appears to have been written by “N. A. Kaufman” and though I cannot find her in the genealogical chart of the Isaac Kaufman (1806-1867) and Eliza Smith (1811-1863), she appears to have been a sister of their children who are mentioned in her letter. They include George “Willis”) Kaufaman (b. 1842), Abraham David Kaufman (b. 1846), and Theodore S. Kaufman (1844-1908) of Boiling Springs, Pennsylvania.