The first is, Amsterdam, 29th of May. A letter from Toulon, of the 8th of this month, contains the following details. "Orders have arrived here from Court, to send out into the Road, as soon as may be, the ships of the line, the Zélé and the Marseillois; but as the destination of these two ships is kept extremely secret, we exhaust ourselves in conjectures concerning the object of the operations, which they are ordered to execute. Some will have it, that they have orders to go and join the squadron of Don Solano, which sailed from Cadiz the 28th of last month, which it is pretended is bound to Brest. Others presume, that they have no other commission, than to go and cruise in the neighborhood of Mahon, to keep in the privateers, which frequently come out from thence, and which give extreme trouble to the navigation of the ports of the Mediterranean; in fine, there are some who believe that these vessels are to co-operate in an important enterprise, which is to be attempted in that sea. However this may be, as we know that a number of vessels have been taken up upon freight, on account of the King, and that they may easily embark in our port eleven or twelve thousand men; as moreover, it is more than probable that on the one hand, the entrance of the Straits of Gibraltar being sufficiently guarded by the Spaniards, so that there will not be occasion for a strong squadron to protect the transport vessels, which may be employed in an expedition against Mahon; and that on the other hand, the English being sufficiently occupied on diverse sides, may not be able easily to send to the relief of this island, we conclude from the combination of these different circumstances, that it may very well happen, that they may attempt this conquest, the success of which does not appear in effect to present any very insurmountable difficulties, and which would procure, after all, an advantage sufficiently important to the good of our commerce in general to merit that at least we should make the essay." The other article is in the Amsterdam Gazette of the 30th of May, and from Paris the 23d of May, 1780.