I had the honor of addressing you on the 27th ult., since which letters are received of January 24th, from Mr. Carmichael, and of January 3d and 15th, Madrid, and February 6th, and 12th, Lisbon, from Colonel Humphreys. As these are interesting, and may tend to settle suspense of mind to a certain degree, I shall trouble you with quotations from some parts and the substance of others. Colonel H. says, "I learn from other good authority, as well as from Mr. Carmichael, that all the representations of Gardoqui (when minister in America), tended to excite a belief that the most respectable and influential people throughout the United States did not wish to have the navigation of the Mississippi opened for years to come, from an apprehension such an event would weaken the government, and impoverish the Atlantic States by emigrations. It was even pretended that none but a handful of settlers on the Western waters, and a few inhabitants of the Southern States would acquiesce in the measure." This is the state of mind to which they have reverted since the crisis with England is passed, for during that, the Count de Florida Blanca threw out general assertions that we should have no reason to complain of their conduct with respect to the Mississippi, which gave rise to the report its navigation was opened. The following passages will be astonishing to you who recollect that there was not a syllable in your letters to Mr. G. M., which looked in the most distant manner to Spain. Mr. Carmichael says, "something, however, might have been done in a moment of projects and apprehension, had not a certain negotiation carried on, on our part, at London, transpired, and which I think was known here rather from British policy, than from the vigilance of the Marquis del Campo. Entirely unacquainted with this manœuvre, although in correspondence with the person employed, I was suspected to be in the secret. This suspicion banished confidence, which returns by slow degrees. This circumstance induced me to drop entirely my correspondence with G. M. To continue it would have done harm, and certainly could do no good. I have seen extracts of the President's letter communicated to the Duke of Leeds, perhaps mutilated or forged to serve here the views of the British cabinet. I do not yet despair of obtaining copies of those letters through the same channel that I procured the first account of the demands of G. B. and the signature of the late convention." Colonel Humphreys says, "the minister had intimations from del Campo of the conferences between Mr. Morris and the Duke of Leeds, which occasioned him to say with warmth to Mr. Carmichael, 'now is your time to make a treaty with England.' Fitzherbert availed himself of these conferences to create apprehensions that the Americans would aid his nation in case of war." Your genuine letter could have made no impression. The British court then must have forged one, to suit their purpose, and I think it will not