Thomson Mason, the second son of George and Anne (Thomson) Mason was born at Doeg's Neck in 1733, and died February 26, 1785, it is said at his seat "Chopawamsic" in Stafford; but he was buried at "Raspberry Plain", his estate near Leesburg, Loudoun County, Va. He was educated at William and Mary College, Va.; studied law at the Middle Temple, London; was a Burgess, 1766 to 1775, from Stafford and Loudon Counties; in 1778 appointed a Member of the first Supreme Court of Virginia, which office he held for a short time, and was afterwards one of the five Judges of the General Court; in 1779 to 1783 a Member of the House of Delegates. He married in 1759, Mary, only daughter of Colonel Abraham and Mary (King) Barnes.