Amid the labours of the Congress, their attention was turned on the condition of the kingdom of Naples; and it was urged by Talleyrand, in particular, that allowing the existence of the sovereignty of Murat in that beautiful kingdom, was preserving, at the risk of future danger to Europe, an empire, founded on Napoleon's principles, and governed by his brother-in-law. It was answered truly, that it was too late to challenge the foundation of Murat's right of sovereignty, after having gladly accepted and availed themselves of his assistance, in the war against Buonaparte. Talleyrand, by exhibiting to the Duke of Wellington a train of correspondence[93] between Buonaparte, his sister Caroline, and Murat, endeavoured to show that the latter was insincere, when seeming to act in concert with the allies. The Duke was of opinion, that the letters did not prove treachery, though they indicated what was to be expected, that Murat took part against his brother-in-law and benefactor, with considerable reluctance. The matter was now in agitation before the Congress; and Murat, conceiving his power in danger, seems to have adopted the rash expedient of changing sides once more, and again to have renewed his intercourse with Napoleon. The contiguity of Elba to Naples rendered this a matter of little difficulty; and they had, besides, the active assistance of Pauline, who went and came between Italy and her brother's little court. Napoleon, however, at all times resolutely denied that he had any precise share or knowledge of the enterprise which Murat meditated. The King of France, in the meanwhile, recalled by proclamation all Frenchmen who were in the Neapolitan service, and directed the title of King Joachim to be omitted in the royal almanack. Murat, alarmed at this indication of hostile intentions, carried on a secret correspondence with France, in the course of which a letter was intercepted, directed to the King of Naples, from General Excelsman, professing, in his own name and that of others, devoted attachment, and assuring him that thousands of officers, formed in his school and under his eye, would have been ready at his call, had not matters taken a satisfactory turn. In consequence of this letter, Excelsman was in the first place put on half-pay and sent from Paris, which order he refused to obey. Next he was tried before a court-martial, and triumphantly acquitted. He was admitted to kiss the king's hand, and swear to him fidelity _à toutes épreuves_. How he kept his word will presently appear. In the meantime the King had need of faithful adherents, for the nets of conspiracy were closing fast around him. [Sidenote: ESCAPE FROM ELBA.]