Bullitt developed his plantation, known as
Mount View, on a peninsula where
Quantico Creek enters the
Potomac River. He also donated land which became the town of
Dumfries, which was a port for shipping tobacco until it silted up after his man's lifetime. On 24 September 1765 Bullitt shot and killed Virginia
Burgess John Baylis in a
duel. Baylis had insulted Bullitt's brother-in-law, then 18-year old John Scott. He was acquitted on grounds of self defense. As the
American Revolutionary War neared, Bullitt became active politically, as did his militia officer brother Thomas as well as his Scott in-laws, among others. Bullitt joined Prince William County's
Committee of Safety as did
Lynaugh Helm and
Henry Lee III. In 1776 Prince William County voters elected Bullitt and Lee as the county's delegates to the fifth
Virginia Revolutionary Convention. That meeting became a constitutional convention, producing an interim constitution used by the new Commonwealth for the next several years. Serving the new state government, Bullitt became the Commonwealth Attorney (prosecutor) in Prince William County. Fellow legislators elected Bullitt a state court judge in 1780. His name is spelled three ways in the 1787 state tax census. Nonresident "Cuthbert Bullet" owned land and no slaves in Botetourt County, Virginia (near his late brother's area of exploration); nonresident ""Cuthbert Bullitt" owned 19 enslaved people older than 16 and 25 under that age in Fauquier County (where he was born and his father had owned land), and "Cuthbert Bullett" owned five enslaved adults and nine children in Prince William County. ==Death and legacy==