Whilst the army of the princes thus increased in strength at Coblentz, the counter-revolutionary diplomacy was on the eve of the first great result it had been enabled to obtain in the actual state of Europe. The conferences of Pilnitz had opened, and the Count de Provence had sent the baron Roll from Coblentz to the king of Prussia, to demand in the name of Louis XVI. the assistance of his troops to aid in the re-establishment of order in France. The king of Prussia, before deciding, wished to learn the state of France from a man whose military talents and devoted attachment to the monarchy had gained him the confidence of the foreign courts,--the Marquis de Bouille. He fixed the Chateau de Pilnitz as the meeting place, and requested him to bring a plan of operation for the foreign armies on the different French frontiers; and on the 24th of August Frederic Willam, accompanied by his son, his principal generals, and his ministers, arrived at the Chateau de Pilnitz, the summer residence of the court of Saxony, where he had been preceded by the emperor. The Archduke Francis, afterwards the emperor Francis II., the Marechal de Lascy, the Baron de Spielman, and a numerous train of courtiers, attended the emperor. The two sovereigns, the rivals of Germany, seemed for a time to have laid aside their rivalry to occupy themselves solely with the safety of the thrones of Europe; this fraternity of the great family of monarchs prevailed over every other feeling, and they treated each other more like brothers than sovereigns, whilst the elector of Saxony, their entertainer, enlivened the conference by a succession of splendid fetes.