Necessity of providing means for the safe conveyance of the public correspondence.--His letters are opened and many kept back both in Spain and the United States. Instructions to John Jay. In Congress, February 15th, 1781, 403 Instructing him to recede from the demand of a free navigation of the Mississippi below 31°. James Lovell to John Jay. February 20th, 1781, 404 Has received no letters from him of late. James Lovell to John Jay. March 9th, 1781, 405 Ratification of the articles of the Confederacy. To the President of Congress. Madrid, March 22d, 1781, 405 Supplies from Spain.--Russian mediation.--M. Necker's report. To the President of Congress. Madrid, April 25th, 1781, 406 Spain insists on the exclusive navigation of the Mississippi.--Letter from Mr Jay to De Neufville and Son (Madrid, January 8th, 1781), renouncing the idea of a loan in Holland separate from that negotiated by Mr Adams.--Mr Jay's proceedings in regard to the payment of the bills.--Advises that the unfinished ships be sold to Spain.--Disposition of Portugal.--Dr Franklin.--Mr Cumberland's mission.--Disposition of Spain. The President of Congress to John Jay. In Congress, May 28th, 1781, 415 Expressing the satisfaction of Congress with his conduct.--Instructs him to disavow any understanding between the United States and Great Britain; to avoid referring to the treaty with France in his negotiations with Spain; to declare that facilities will be granted for the exportation of naval stores for the Spanish marine; to continue to provide as far as possible for American seamen in Spain; to open a correspondence with M. D'Audibert Caille. To the President of Congress. Aranjues, May 29th, 1781, 419 Conversation with the Count de Florida Blanca on the admission of letters. James Lovell to John Jay. Philadelphia, June 4th, 1781, 420 The affair of the Dover cutter. James Lovell to John Jay. Philadelphia, June 15th, 1781, 421 Case of Dumain and Lyon. Robert Morris to John Jay. Philadelphia, July 4th, 1781, 421 Mr Morris is appointed Superintendent of Finance.--Objects to be accomplished by this office.--Expectations of aid from Spain.--State of the finances.--Disposition of the nation.--State of the army.--Advantages that will result to Spain by aiding America.--The United States cannot be dangerous to Spain.--Amount desired. Robert Morris to John Jay. Philadelphia, July 7th, 1781, 435 Necessity of immediate aids.