The Chevalier del Pinto, who treated with us on behalf of Portugal, being resident at London, I have presumed that causes of the delay of that treaty had been made known to Mr. Adams, and by him communicated to you. I will write to him by Colonel Franks, in order that you may be answered on that subject. The publication of the enclosed extract from my letter of May the 27th, 1786, will, I fear, have very mischievous effects. It will tend to draw on the Count de Vergennes the formidable phalanx of the Farms; to prevent his committing himself to me in any conversation which he does not mean for the public papers; to inspire the same diffidence into all other ministers, with whom I might have to transact business; to defeat the little hope, if any hope existed, of getting rid of the Farm on the article of tobacco; and to damp that freedom of, communication which the resolution of Congress of May the 3rd, 1784, was intended to re-establish. Observing by the proceedings of Congress, that they are about to establish a coinage, I think it my duty to inform them, that a Swiss, of the name of Drost, established here, has invented a method of striking the two faces and the edge of a coin, at one stroke. By this, and other simplifications of the process of coinage, he is enabled to coin from twenty-five thousand to thirty thousand pieces a day, with the assistance of only two persons, the pieces of metal being first prepared. I send you by Colonel Franks three coins of gold, silver, and copper, which you will perceive to be perfect medals: and I can assure you, from having seen him coin many, that every piece is as perfect as these. There has certainly never yet been seen any coin, in any country, comparable to this. The best workmen in this way acknowledge that his is like a new art. Coin should always be made in the highest perfection possible, because it is a great guard against the danger of false coinage. This man would be willing to furnish his implements to Congress, and if they please, he will go over and instruct a person to carry on the work: nor do I believe he would ask any thing unreasonable. It would be very desirable, that in the institution of a new coinage, we could set out on so perfect a plan as this, and the more so, as while the work is so exquisitely done, it is done cheaper.