The danger with which Andre was menaced was most terrible, and the importance of the game he was playing made him feel that he had everything to fear from the boldness and audacity of his enemies.  He knew this, and he also knew that spies dogged all his movements.  What could be wanted but a favorable opportunity to assassinate him.  But even this knowledge did not make him hesitate for an instant, and all his caution was fully exercised, for he felt that should he perish, Sabine would be inevitably lost.  On her account he acted with a prudence which was certainly not one of his general characteristics.  He was quite aware that he might put himself under the protection of the police, but this he knew would be to imperil the honor of the Mussidan family.  He was sure that with time and patience he should be able to unravel the plots of the villains who were at work.  But he had not time to do so by degrees.  No, he must make a bold dash at once.  The hideous sacrifice of which Sabine was to be the victim was being hurried on, and it seemed to him as if his very existence was being carried away by the hours as they flitted by.  He went over recent events carefully one by one, and he strove to piece them together as a child does the portions of a dissected map.  He wanted to find out the one common interest that bound all these plotters together—­Verminet, Van Klopen, Mascarin, Hortebise, and Martin Rigal.  As he submitted all this strange combination of persons to the test, the thought of Gaston de Gandelu came across his mind.

“Is it not curious,” thought he, “that this unhappy boy should be the victim of the cruel band of miscreants who are trying to destroy us?  It is strange, very strange.”

Suddenly he started to his feet, for a fresh idea had flashed across his brain—­a thought that was as yet but crude and undefined, but which seemed to bear the promise of hope and deliverance.  It seemed to him that the affair of young Gandelu was closely connected with his own, that they were part and parcel of the same dark plot, and that these bills with their forged acceptance had more to do with him than he had ever imagined.  How it was that he and Gaston could be connected he could not for a moment guess; yet now he would have cheerfully sworn that such was the case.  Who was it that had informed the father of the son’s conduct?  Why, Catenac.  Who had advised that proceedings should be taken against Rose, alias Zora?  Why, Catenac again; and this same man, in addition to acting for Gandelu, it seems, was also the confidential solicitor of the Marquis de Croisenois and Verminet.  Perhaps he had only obeyed their instructions.  All this was very vague and unsatisfactory, but it might be something to go upon, and who could say what conclusion careful inquiry might not lead him to? and Andre determined to carry on his investigations, and endeavor to find the hidden links that connected this chain of rascality together.  He had taken up a pencil with the view of making a few notes, when he heard a knock at his door.  He glanced at the clock; it was not yet nine.