Col. Thomas Blackburn (c.1740–1807), a Prince William County justice, lived at Rippon Lodge near Dumfries. His wife was Christian Scott Blackburn (b. 1745), younger sister of Miss Catherine Scott. Dr. William Brown (1748–1792) graduated from the University of Edinburgh in 1770 and had begun to practice medicine in Alexandria. He would soon marry Catherine Scott. Miss Brown is probably Dr. Brown’s sister Frances Brown (d. 1823), who would later marry Charles Alexander of Fairfax County (HAYDEN description begins Horace Edwin Hayden. Virginia Genealogies. A Genealogy of the Glassell Family of Scotland and Virginia, also of the Families of Ball, Brown, Bryan, Conway, Daniel, Ewell, Holladay, Lewis, Littlepage, Moncure, Peyton, Robinson, Scott, Taylor, Wallace, and others, of Virginia and Maryland. 1891. Reprint. Baltimore, 1973. description ends , 165, 177–78, 601–3).