Sally Hemmings' gown made from the patterned gray fabric selected by Thomas Jefferson and Mrs. Cosway is the same costume worn by Jessica Oyelowo (Sarah) in Sleepy Hollow (1999), and by Billie Piper (Fanny Price) during the play rehearsal scene in Mansfield Park (2007).
Jefferson was in Paris from 1785 to 1789, but is depicted as witnessing the Mongolfier balloon ascent (with sheep, duck, and rooster) which took place in 1783.