Arthur Pendleton Mason

Arthur "Pen" Pendleton Mason (11 December 1835–22 April 1893) was an American military officer, merchant, planter and lawyer who served as a lieutenant colonel in the Confederate States Army serving during the American Civil War. Mason was a scion of the prominent Mason political family of Virginia. He was the ninth and youngest child of Thomson Francis Mason (1785–21 December 1838) and his wife Elizabeth "Betsey" Clapham Price (1802–21 December 1873).

Mason earned his law degree from the University of Virginia. Mason inherited his father's Colross estate in Alexandria. His mother transferred ownership of Huntley on 7 November 1859 to Mason and his brother Dr. John "Frank" Francis Mason. On 5 June 1861, Mason transferred to the 6th Regiment of Brigadier General Thomas C. Hindman's brigade of Arkansas Volunteers. The couple had four children, with only one surviving to adulthood:

Mason died on 22 April 1893 in Morris Park, The Bronx, New York at age 57. Mason was interred in Green Mount Cemetery in Baltimore, Maryland.