[3] After his 1787 marriage, his father-in-law instructed him to develop area along the newly built Frederick Road, which Carroll owned land next to.

[4] In 1790, Caton built Brooklandwood in Baltimore County, which was added to the National Register of Historic Places in 1972.

[7] They were the parents of four daughters who survived to maturity, including:[8] His eldest three girls were known as "The Three American Graces" due to their beauty and the fact that all married into the English aristocracy.

[16] His widow died the following year on November 14, 1846, leaving a personal fortune of £186,000 (roughly equivalent to $19.9 million).

[16] Through his youngest daughter Emily, his only child to have children, he was a grandfather of four, including Charles Carroll MacTavish (1818–1868),[17] who married Marcella Scott (a daughter of Gen. Winfield Scott);[18] Mary Wellesley MacTavish (1826–1850), who married Hon.