He commanded “Baltimore Light Dragoons” during the Revolution, attaining rank of Captain. He took active part in suppression of Whiskey Rebellion in 1794, and that year purchased “Bosley’s Adventure,” a 350-acre farm west of Roland’s Run (north of present Lake Roland). Member of State Legislature 1801–1802, he served in Congress 1803–1811 and 1813–1815. As a Lieutenant Colonel at outbreak of War of 1812, he was appointed Commandant of 6th Regiment Cavalry District of Maryland. His grave near Circle and Ruxton Roads is no longer marked.