The invention is certainly very ingenious, and while it compares advantageously with all others in other circumstances, it has an unrivalled preference as being so much more profitable. I had never heard of the invention till your letter announced it, for these novelties reach us very late, which renders your attentions on the occasion more acceptable, and more entitled to the acknowledgments which I now tender. The decrees and orders of the belligerent nations having amounted nearly to declarations that they would take our vessels wherever found. Congress thought it best in the first instance to break off all intercourse with them. They adjourned on Monday last, having passed an act authorizing me to suspend the embargo whenever the belligerents should revoke their decrees or orders as to us. The embargo must continue, therefore, till they meet again in November, unless the measures of the belligerents should change. When they meet again, if these decrees and orders still continue, the question which they will have to decide will be, whether a continuance of the embargo or war will be preferable. In the meantime great advances are making in the establishment of manufactures. Those of cotton will, I think, be so far proceeded on, that we shall never again have to recur to the importation of cotton goods for our own use. I tender you my salutations, and the assurances of my great respect. TO GENERAL ARMSTRONG. WASHINGTON, May 2, 1808. DEAR GENERAL,--A safe conveyance offering by a special messenger to Paris, I avail myself of it to bring up my arrears to my foreign correspondents. I give them the protection of your cover, but to save the trouble of your attention to their distribution, I give them an inner cover to Mr. Harden, whose attentions heretofore have encouraged me to ask this favor of him. But should he not be with you, I must pray you to open my packages to him, and have them distributed, as it is of importance that some of them should be delivered without delay. I shall say nothing to you on the subject of our foreign relations, because you will get what is official on that subject from Mr. Madison.