1To Thomas Jefferson from James Sullivan, 8 January 1799 (Jefferson Papers)
One Mr Dearborn of this Town whom I conceive to be a natural Machanic, carries this letter to Philadelphia and hopes to have the honor to deliver it to you. His object is to gain by Patents an exclusive priviledge in several inventions among which are a perpendicular wind-Mill on new & useful principles, a Steelyard calculated to prevent fraud—a Trigonometrical Instrument useful in measuration...