1From George Washington to John Dickinson, 5 November 1782 (Washington Papers)
I must request your Excellency to make it a Rule in future, when persons apply for Liberty to go to or within the Enemy’s Lines, to insert in your passports that they shall repair to Dobbs’s Ferry, which is the only Post from whence Flags are sent or at which they are received. This is absolutely necessary to prevent that illegal Intercourse & Traffic which are now carried to so great a...