She also befriended and sponsored emigre American painter John Trumbull, who went on to create some of the most famous paintings of the Revolutionary War era.
He studied with the painters Colonel John Trumbull, who first advised him to be an architect because of his skilled drawings, and John Quidor.
When the Berlin assignment was completed Clemens traveled in 1792 with royal permission to London to work on a new etching based on John Trumbull's "Death of General Montgomery".
In 1796 he was appointed by the commissioners sent by the two countries as the fifth member of a commission charged with carrying out the seventh article of the Jay Treaty, which mediated claims by American and British merchants and the opposing government stemming from actions which occurred during the war.
His last moments are romanticised in John Trumbull's famous painting, The Sortie Made by the Garrison of Gibraltar, 1789.
The National Portrait Gallery contains Ball Hughes' busts of Nathaniel Bowditch, Washington Irving, James Kent, John Marshall, and his medallion of John Trumbull.
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Two others present historical tableaux drawn from famous paintings of crucial national events: John Vanderlyn's Landing of Columbus (15 cent) and John Trumbull's Signing of the Declaration of Independence (24 cent).