The collection includes: XLII, 179. Le Roy, Jean Baptiste, 120-1800. to Benjamin Franklin, 1770 April 22. A.L. 4p. Plans for seeing Franklin in England before the end of the year. Has sent him his brother’s [Pierre LeRoy] work on the determination of longitude at sea. Promises to send him Abbe Galiani’s work, Sur les Commerces des Bles. Project to raise a statue to Voltaire before his death. Recommending his brother, the physician [Charles LeRoy], to Franklin and Mr. Pringle. (In French).