Letters written by Julia Rush, wife of Benjamin Rush, mainly to her husband, with one to Samuel Stockton and one to Mary Rush. Eight letters were written during the 1793 yellow fever epidemic. The letters are not included in Lyman Butterfield's edition of Benjamin Rush's letters, vol. 30 of APS Memoirs (1951).

Catherine Wistar Bache (1805-1886) was the point of connection between two of Philadelphia's most illustrious families of the late eighteenth century. Daughter of the physician Caspar Wistar, in November 1797 she married Dr. William Bache, who was the son of Richard Bache and the grandson of Benjamin Franklin. Primarily letters to Mrs. Bache (wife of Dr. William Bache) of Philadelphia, from Mrs. David Hosack (nee Mary Eddy), Mrs. Elizabeth Trist, and Mary Jones. The letters are personal and concern family life, activities of husbands, etc., with many references to Caspar Wistar, There are comments on diseases, education (at William and Mary College), war, and politics. References are also made to the deaths of Richard Bache and Caspar Wistar, and to Benjamin Franklin's Stockado (a musical instrument).