. The Baron von Thulemeyer proposed a commercial treaty to JA
on 19 Feb., at The Hague (Wharton, ed., Dipl. Corr. Amer. Rev.
, 6:784–785). JA
expressed interest and promptly consulted with Franklin and Jay at Paris, and with
Congress, to begin preparations for the necessary negotiations. On 9 April, von Thulemeyer
with a 27-article plan, in French, which JA
promptly sent to Congress (9–10 April, Adams Papers
, copy in JA
's hand). The United States and Prussia finally concluded their commercial treaty
on 10 Sept. 1785, with von Thulemeyer, Franklin, Jefferson, and JA
signing it at different dates, in different cities (Miller, ed., Treaties
, p. 162–184).