The President is absent on a journey through the southern States, from which he will not return till the end of June; consequently, I could not sooner notify him of your desire to return; but even then, I will take the liberty of saying nothing to him on the subject till I hear further from you. The suppression of your correspondence has, in a considerable degree, withdrawn you from the public sight. I sincerely wish that before your return, you could do something to attract their attention and favor, and render your return pleasing to yourself and profitable to them, by introducing you to new proofs of their confidence. My two last letters to you furnish occasions; that of a co-operation against the British navigation act and the arrangement of our affairs on the Mississippi. The former, if it can be effected, will form a remarkable and memorable epoch in the history and freedom of the ocean. Mr. Short will press it at Paris, and Colonel Humphreys at Lisbon. The latter will show most at first; and as to it, be so good as to observe always, that the right of navigating the Mississippi is considered as so palpable, that the recovery of it will produce no other sensation than that of a gross injustice removed. The extent and freedom of the port for facilitating the use of it, is what will excite the attention and gratification of the public. Colonel Humphreys writes me, that all Mr. Gardoqui's communications, while here, tended to impress the court of Madrid with the idea, that the navigation of the Mississippi was only demanded on our part to quiet our western settlers, and that it was not sincerely desired by the maritime States. This is a most fatal error, and must be completely eradicated and speedily, or Mr. Gardoqui will prove to have been a bad peacemaker. It is true, there were characters whose stations entitled them to credit, and who, from geographical prejudices, did not themselves wish the navigation of the Mississippi to be restored to us, and who believe, perhaps, as is common with mankind, that their opinion was the general opinion. But the sentiments of the great mass of the Union were decidedly otherwise then, and the very persons to whom Mr. Gardoqui alluded, have now come over to the opinion heartily, that the navigation of the Mississippi, in full and unrestrained freedom, is indispensably necessary, and must be obtained by any means it may call for. It will be most unfortunate, indeed, if we cannot convince Spain that we make this demand in earnest, but by acts which will render that conviction too late to prevent evil. Not knowing how better to convey to you the laws and the gazettes, than by committing them to the patronage of Colonel Humphreys, I now send through that channel the laws of the second and third sessions of Congress, and the newspapers. I have the honor to be, with great esteem, Sir, your most obedient, and most humble servant. TO C. CARROLL OF CARROLLTON.