According to the Library of Congress entry for this engraving, the bottom of the engraving originally had the following inscription: "peint par Madame Filleul ; gravé par Cahtelin, Graveur du Roi." Filleul's painting is in the Philadelphia Museum, which has this label: "Filleul and her husband were on friendly terms with Benjamin Franklin, who may have sat for this portrait as a personal favor. In 1779 Louis Jacques Cathelin (1738-1804) made an engraving after the painting that was published the same year by Filleul's father, Blaise Bocquet. The map on the table is labeled PHILADELPHIA."