"Signor, I recognise you," replied the Grand Duke. "Let the room be cleared--I must speak with this gentleman alone." When the company had quitted the saloon, I entered into a minute detail of the events of the evening, to which his Highness paid the greatest attention; and when I had finished, the whole mystery was unravelled to me by him, and with which I will now satisfy the curiosity of my readers. The Grand Duke had one daughter, by name Viola, whom he had wished to marry to Rodolph, Count of Istria; but Viola had met with Albert, Marquis of Salerno, and a mutual attachment had ensued. Although the Grand Duke would not force his daughter's wishes and oblige her to marry Count Rodolph, at the same time he would not consent to her espousals with the Marquis Albert. Count Rodolph had discovered the intimacy between Viola and the Marquis of Salerno, and had made more than one unsuccessful attempt to get rid of his rival by assassination. After some time, a private marriage with the marquis had been consented to by Viola; and a year afterwards the Lady Viola retired to the country, and without the knowledge, or even suspicions, of her father, had given birth to a male child, which had been passed off as the offspring of one of the ladies of the court who was married, and to whom the secret had been confided. At this period the secret societies, especially the _Carbonari_, had become formidable in Italy, and all the crowned heads and reigning princes were using every exertion to suppress them. Count Rodolph was at the head of these societies, having joined them to increase his power, and to have at his disposal the means of getting rid of his rival. Of this the Marquis of Salerno had received intimation, and for some time had been trying to obtain proof against the count; for he knew that if once it was proved, Count Rodolph would never be again permitted to appear in the state of Lucca. On the other hand, Count Rodolph had been making every arrangement to get rid of his rival, and had determined that it should be effected at this masquerade.