Sir,--My letter of the 17th and 18th instant, gave you the progress of the States General to the 17th, when the Tiers had declared the illegality of all the existing taxes, and their discontinuance from the end of their present session. The next day being a jour de fête, could furnish no indication of the impression that vote was likely to make on the government. On the 19th, a Council was held at Marly, in the afternoon. It was there proposed, that the King should interpose by a declaration of his sentiments in a _seance royale_. The declaration prepared by Mr. Neckar, while it censured in general the proceedings both of the Nobles and Commons, announced the King's views, such as substantially to coincide with the Commons. It was agreed to in Council, as also that the _seance royale_ should be held on the 22d, and the meetings till then be suspended. While the Council was engaged in this deliberation at Marly, the chamber of the Clergy was in debate, whether they should accept the invitation of the Tiers to unite with them in the common chamber. On the first question, to unite simply and unconditionally, it was decided in the negative by a very small majority. As it was known, however, that some members who had voted in the negative, would be for the affirmative with some modifications, the question was put with these modifications, and it was determined by a majority of eleven members, that their body should join the Tiers. These proceedings of the clergy were unknown to the Council at Marly, and those of the Council were kept secret from everybody. The next morning (the 20th), the members repaired to the House as usual, found the doors shut and guarded, and a proclamation posted up for holding a _seance royale_ on the 22d, and a suspension of their meetings till then. They presumed, in the first moment, that their dissolution was decided, and repaired to another place, where they proceeded to business. They there bound themselves to each other by an oath, never to separate of their own accord, till they had settled a constitution for the nation on a solid basis, and if separated by force, that they would re-assemble in some other place. It was intimated to them, however, that day, privately, that the proceedings of the _seance royale_ would be favorable to them. The next day they met in a church, and were joined by a majority of the Clergy. The heads of the aristocracy saw that all was lost without some violent exertion. The King was still at Marly. Nobody was permitted to approach him but their friends. He was assailed by lies in all shapes. He was made to believe that the Commons were going to absolve the army from their oath of fidelity to him, and to raise their pay. * * * * *