Although his great grandfather, Daniel Carroll of Duddington (1707–1734) owned the land that eventually became Capitol Hill in the District of Columbia,[3][4] by this time the family operated plantations near Hagerstown in Washington County, Maryland.

[9][10] Henry was appointed courier for the delivery of the peace treaty to James Madison for ratification by the United States government.

On January 2, 1815, Anthony St. John Baker and Henry Carroll embarked the British sloop ship HMS Favorite in London sailing under a flag of truce to the United States with a distant anchoring at Sandy Hook peninsula on February 11, 1815.

The treaty was delivered to President Madison at a temporary Executive Mansion better known as The Octagon House.

[15] American Peace Treaty Commission at Ghent, United Netherlands Grievances and Origins of the War of 1812