SIR,--The last letters I had the honor of addressing you were of the 3d and 7th of November. Your several favors, to wit, two of July 27, two of Oct. 24, and one of Nov. 3, have all been delivered within the course of a week past; and I embrace the earliest occasion of returning to Congress my sincere thanks for the new proofs I receive therein of their confidence in me, and of assuring them of my best endeavors to merit it. The several matters on which I receive instruction shall all be duly attended to. The Commissioners of the Treasury inform me they will settle the balance appropriated to the Barbary business, apprise me of it, and place it under my power. The moment this is done, I will take the measures necessary to effect the instructions of Congress. The letter to you from the Governor of Rhode Island desires my attention to the application of the claimants of the brig Apollonia, which shall surely be complied with. I trust that an application will be made by the claimants. It will be the more important, as the letter in this case, as in that of the sloop Sally, formerly recommended to me, is directed to an advocate whom all my endeavors have not enabled me to find. I fear, therefore, that the papers in both cases must remain in my hands till called for by the person whom the parties shall employ for the ordinary solicitation and management of their appeals. I suppose they will engage some person to answer from time to time the pecuniary demands of lawyers, clerks, and other officers of the courts, to wait upon the judges and explain their cases to them, which is the usage here, to instruct their lawyers and confer with them whenever necessary, and in general to give all those attentions which the solicitation of private causes constantly require here. Their management indeed is very much a matter of intrigue and of money. The public affairs of Europe are quiet at present, except as between the Turks and Russians; and, even these, some people suppose may be quieted. It is thought that Russia would accommodate easily. The peace between France and England is very generally considered as insecure. It is said the latter is not honestly disarming; she is certainly augmenting her land forces, and the speech of the King, and debates of the court members, prove their diffidence in the late accommodation. Yet it is believed their premier is a friend to peace, and there can be no doubt of the same dispositions in the chief minister here. The divisions continue between the King and his parliament. A promise has been obtained for convoking the States general, as early as 1791, at farthest. The embarrassments in the department of finance are not yet so cleared up as that the public can see their way through them. The arrival of the Count de La Luzerne, just now announced, will probably put their marine operations into new activity.