To Mr. Dallas.

DEAR SIR,—It being finally arranged that Mr. Crawford will enter the Treasury Department on Monday next, I lose no time in apprizing you of the day on which the requisition on your kind and protracted attention to its duties will be at an end. The letter offering the War Department to Mr. Lowndes having been sent to New York, missed of him altogether; and it unluckily happened that he set out, after his return to Washington, before I had an opportunity of communicating with him. A letter will follow him, with a chance of overtaking him before he reaches Charleston; but it will probably not arrest his journey should the object of it be acceptable to him.

I thank you very much, my Dear Sir, for the friendly offers in your favor of the 5 instant, and I renew all my acknowledgments and assurances with respect to the past services, for which I am personally indebted, as well as our Country, which is enjoying and awaiting the beneficial fruits of them.

Accept my high esteem and my cordial salutations.

P.S. Nothing has occurred diminishing the improbability of Col. Jesup’s intelligence. You will have noticed an occurrence in the Gulph of Mexico, which is producing considerable sensation. We are not yet able to appreciate all its circumstances. But it is difficult to believe that the conduct of the Spanish squadron is to be ascribed to hostile orders from Madrid.