Mr. Prager is probably Mark Prager, Sr., a member of the Jewish mercantile family that came to Philadelphia shortly after the Revolution. The firm, at first called Pragers, Liebaert & Co., was some time before 1791 changed to Pragers & Co. GW had written William Fitzhugh on 23 July 1784 introducing Mr. Prager, who had been strongly recommended to him as “a Gentleman who is very extensively engaged in Trade, & a partner in several very capital Houses in Europe. He is taking a review of the State of our Trade & Ports, & probably, if he finds them answerable to his wishes, will fix a House in this State” (DLC:GW). Prager evidently found Philadelphia more to his liking.