Nevertheless, Patrice was not easy in his mind. The enemy had given him too many proofs of reckless daring to let him imagine that he could take any steps to ensure her perfect protection. Danger always creeps in where it is least expected; and it was all the more difficult to ward off in that no one knew whence it threatened. Now that Essarès Bey was dead, who was continuing his work? Who had inherited the task of revenge upon Coralie announced in his last letter? M. Masseron had at once begun his work of investigation, but the dramatic side of the case seemed to leave him indifferent. Since he had not found the body of the man whose dying cries reached Patrice Belval's ears, since he had discovered no clue to the mysterious assailant who had fired at Patrice and Coralie later in the day, since he was not able to trace where the assailant had obtained his ladder, he dropped these questions and confined his efforts entirely to the search of the eighteen hundred bags of gold. These were all that concerned him. "We have every reason to believe that they are here," he said, "between the four sides of the quadrilateral formed by the garden and the house. Obviously, a bag of gold weighing a hundredweight does not take up as much room, by a long way, as a sack of coal of the same weight. But, for all that, eighteen hundred bags represent a cubic content; and a content like that is not easily concealed." In two days he had assured himself that the treasure was hidden neither in the house nor under the house. On the evenings when Essarès Bey's car brought the gold out of the coffers of the Franco-Oriental Bank to the Rue Raynouard, Essarès, the chauffeur and the man known as Grégoire used to pass a thick wire through the grating of which the accomplices spoke. This wire was found. Along the wire ran hooks, which were also found; and on these the bags were slung and afterwards stacked in a large cellar situated exactly under the library. It is needless to say that M. Masseron and his detectives devoted all their ingenuity and all the painstaking patience of which they were capable to the task of searching every corner of this cellar. Their efforts only established beyond doubt that it contained no secret, save that of a staircase which ran down from the library and which was closed at the top by a trap-door concealed by the carpet. In addition to the grating on the Rue Raynouard, there was another which overlooked the garden, on the level of the first terrace. These two openings were barricaded on the inside by very heavy shutters, so that it was an easy matter to stack thousands and thousands of rouleaus of gold in the cellar before sending them away.