SIR,--I am honored by your favor of the 17th instant. A war between France and England does not necessarily engage America in it; and I think she will be disposed rather to avail herself of the advantages of a neutral power. By the former usage of nations, the goods of a friend were safe, though taken in an enemy bottom, and those of an enemy were lawful prize, though found in a free bottom. But in our treaties with France, &c., we have established the simpler rule, that a free bottom makes free goods, and an enemy bottom, enemy goods. The same rule has been adopted by the treaty of armed neutrality between Russia, Sweden, Denmark, Holland and Portugal, and assented to by France and Spain. Contraband goods, however, are always excepted, so that they may still be seized; but the same powers have established that naval stores are not contraband; and this may be considered now as the law of nations. Though England acquiesced under this during the late war, rather than draw on herself the neutral powers, yet she never acceded to the new principle, and her obstinacy on this point, is what has prevented the late renewal of her treaty with Russia. On the commencement of a new war, this principle will probably be insisted on by the neutral powers, whom we may suppose to be Sweden, Denmark, Portugal, America, and perhaps Spain. Quere; if England will again acquiesce. Supposing these details might be useful to you, I have taken the liberty of giving them, and of assuring you of the esteem with which I am, Sir, your very humble servant. TO M. LIMOZIN. PARIS, September 22, 1787. SIR,--I must trouble you with another letter to Mr. Jay, to be delivered to Monsieur Bourgoin on board the packet, which I hope will not be sailed before it gets to your hands, as the letter is of extreme importance. It is to inform Congress that official advice is just received here that the Prussian troops entered the territory of Holland on the 15th instant; that most of the principal towns had submitted, that Utrecht was evacuated by the Rhingrave de Salm, and Woerden capitulated, so that Amsterdam remained without defence. M. de St. Priest had stopped at Antwerp and waited further orders. We know also, that the first division of the Russian army has passed the Borysthenes into the Polish Ukraine, and is marching towards the frontiers of Turkey. War then is well kindled in those two quarters. Monsieur Cabarus is arrived at Paris, but will not accept the appointment offered him unless they will adopt his plans. On this there is hesitation; so that it is not certain he will come in. I have received your favor of the 20th, and shall make proper use of its contents. Should the packet be sailed, I will pray you to send my letter by the first of the vessels which you mention bound for Philadelphia. I am, with great esteem, Sir, your most obedient humble servant. TO JOHN JAY.