William Tully (1785-1859) was professor of materia medica and therapeutics at the Medical Institution of Yale College from 1824 to 1842. The collection contains a small amount of correspondence by or to Tully and limited material on Tully's medical career. One subseries concerns settling the estate of William Tully and finding funds to support his daughters Sarah and Elizabeth. The collection contains genealogies, original documents of the Tully family in Connecticut, and also documents related to ancestors of Tully's wife, Mary Potter Tully, particularly her father, the Rev. Elam Potter, and her stepfather, the Rev. Nehemiah Prudden. Photographs include daguerrotypes of Tully's children.