room was directly over Mon. Imbert's office.
Arsène soon realized that his position as secretary was essentially a sinecure. During the first two months, he had only four important letters to recopy, and was called only once to Mon. Imbert's office; consequently, he had only one opportunity to contemplate, officially, the Imbert safe. Moreover, he noticed that the secretary was not invited to the social functions of the employer. But he did not complain, as he preferred to remain, modestly, in the shade and maintain his peace and freedom.
However, he was not wasting any time. From the beginning, he made clandestine visits to Mon. Imbert's office, and paid his respects to the safe, which was hermetically closed. It was an immense block of iron and steel, cold and stern in appearance, which could not be forced open by the ordinary tools of the burglar's trade. But Arsène Lupin was not discouraged.
"Where force fails, cunning prevails," he said to himself. "The essential thing is to be on the spot when the opportunity occurs. In the meantime, I must watch and wait."
He made immediately some preliminary preparations. After careful soundings made upon the floor of his room, he introduced a lead pipe which penetrated the ceiling of Mon. Imbert's office at a point between the two screeds of the cornice. By means of this pipe, he hoped to see and hear what transpired in the room below.
Henceforth, he passed his days stretched at full length upon the floor. He frequently saw the Imberts holding a consultation in front of the safe, investigating books and papers. When they turned the combination lock, he tried to learn the figures and the number of turns they made to the right and left. He watched their movements; he sought to catch their words. There was also a key necessary to complete the opening of the safe. What did they do with it? Did they hide it?
One day, he saw them leave the room without locking the safe. He descended the stairs quickly, and boldly entered the room. But they had returned.
"Oh! excuse me," said, "I made a mistake in the door."
"Come in, Monsieur Lupin, come in," cried Madame Imbert, "are you not at home here? We want your advice. What bonds should we sell? The foreign securities or the government annuities?"
"But the injunction?" said Lupin, with surprise.
"Oh! it doesn't cover all the bonds."
She opened the door of the safe and withdrew a package of bonds. But her husband protested.
"No, no, Gervaise, it would be foolish to sell the foreign bonds. They are going up, whilst the annuities are as high as they ever will be. What do you think, my dear friend?"
The dear friend had no opinion; yet he advised the sacrifice of the annuities. Then she withdrew another package and, from it, she took a paper at random. It proved to be a three-per-cent annuity worth two thousand francs. Ludovic placed the package of bonds in his pocket. That afternoon, accompanied by his secretary, he sold the annuities to a stock-broker and realized forty-six thousand francs.
Whatever Madame Imbert might have said about it, Arsène Lupin did not feel at home in the Imbert house. On the contrary, his position there was a peculiar one. He learned that the servants did not even know his name. They called him "monsieur." Ludovic always spoke of him in the same way: "You will tell monsieur. Has monsieur arrived?" Why that mysterious appellation?
Moreover, after their first outburst of enthusiasm, the Imberts seldom spoke to him, and, although treating him with the consideration due to a benefactor, they gave him little or no attention. They appeared to regard him as an eccentric character who did not like to be disturbed, and they respected his isolation as if it were a stringent rule on his part. On one occasion, while passing through the vestibule, he heard Madame Imbert say to the two gentlemen:
"He is such a barbarian!"
"Very well," he said to himself, "I am a barbarian."
And, without seeking to solve the question of their strange conduct, he proceeded with the execution of his own plans. He had decided that he could not depend on chance, nor on the negligence of Madame Imbert, who carried the key of the safe, and who, on locking the safe, invariably scattered the letters forming the combination of the lock. Consequently, he must act for himself.
Finally, an incident precipitated matters; it was the vehement campaign instituted against the Imberts by certain newspapers that accused the Imberts of swindling. Arsène Lupin was present at certain family conferences when this new vicissitude was discussed. He decided that if he waited much longer, he would lose everything. During the next five days, instead of leaving the house about six o'clock, according to his usual habit, he locked himself in his room. It was supposed that he had gone out. But he was lying on the floor surveying the office of Mon. Imbert. During those five evenings, the favorable opportunity that he awaited did not take place. He left the house about midnight by a side door to which he held the key.
But on the sixth day, he learned that the Imberts, actuated by the malevolent insinuations of their enemies, proposed to make an inventory of the contents of the safe.
"They will do it to-night," thought Lupin.
And truly, after dinner, Imbert and his wife retired to the office and commenced to examine the books of account and the securities contained in the safe. Thus, one hour after another passed away. He heard the servants go upstairs to their rooms. No one now remained on the first floor. Midnight! The Imberts were still at work.
"I must get to work," murmured Lupin.
He opened his window. It opened on a court. Outside, everything was dark and quiet. He took from his desk a knotted rope, fastened it to the balcony in front of his window, and quietly descended as far as the window below, which was that of the of Imbert's office. He stood upon the balcony for a moment, motionless, with attentive ear and watchful eye, but the heavy curtains effectually concealed the interior of the room. He cautiously pushed on the double window. If no one had examined it, it ought to yield to the slightest pressure, for, during the afternoon, he had so fixed the bolt that it would not enter the staple.
The window yielded to his touch. Then, with infinite care, he pushed it open sufficiently to admit his head. He parted the curtains a few inches, looked in, and saw Mon. Imbert and his wife sitting in front of the safe, deeply absorbed in their work and speaking softly to each other at rare intervals.
He calculated the distance between him and them, considered the exact movements he would require to make in order to overcome them, one after the other, before they could call for help, and he was about to rush upon them, when Madame Imbert said:
"Ah! the room is getting quite cold. I am going to bed. And you, my dear?"
"I shall stay and finish."
"Finish! Why, that will take you all night."
"Not at all. An hour, at the most."
She retired. Twenty minutes, thirty minutes passed. Arsène pushed the window a little farther open. The curtains shook. He pushed once more. Mon. Imbert turned, and, seeing the curtains blown by the wind, he rose to close the window.
There was not a cry, not the trace of struggle. With a few precise moments, and without causing him the least injury, Arsène stunned him, wrapped the curtain about his head, bound him hand and foot, and did it all in such a manner that Mon. Imbert had no opportunity to recognize his assailant.
Quickly, he approached the safe, seized two packages that he placed under his arm, left the office, and opened the servants' gate.
