Holmlock Shears had carried the citadel.
In order to escape Lupin's observation and to obtain an entrance into the house which Lucien Destange occupied with his daughter Clotilde, the illustrious detective had been obliged to take a leap in the dark, to resort to untold stratagems, to win the favour and confidence of a host of people under endless different names, in short, to lead forty-eight hours of the most complex life.
The particulars which he had gathered were these: M. Destange, who was in failing health and anxious for rest, had retired from business and was living among the architectural books which it had been his hobby to collect. He had no interest left in life beyond the handling and examining of those old dusty volumes.
As for his daughter Clotilde, she was looked upon as eccentric. She spent her days, like her father, in the house, but in another part of it, and never went out.
"This is all," thought Shears, as he wrote down the titles of the books in his catalogue, to M. Destange's dictation, "this is all more or less indefinite; but it is a good step forward. I am bound to discover the solution of one at least of these exciting problems: is M. Destange an accomplice of Arsène Lupin's? Does he see him now? Are there any papers relating to the building of the three houses? Will these papers supply me with the address of other properties, similarly faked, which Lupin may have reserved for his own use and that of his gang?"
M. Destange an accomplice of Arsène Lupin's! This venerable man, an officer of the Legion of Honour, working hand in hand with a burglar! The presumption was hardly tenable. Besides, supposing that they were accomplices, how did M. Destange come to provide for Arsène Lupin's various escapes thirty years before they occurred, at a time when Arsène was in his cradle?
No matter, the Englishman stuck to his guns. With his prodigious intuition, with that instinct which is all his own, he felt a mystery surrounding him. This was perceptible by small signs, which he could not have described with precision, but which impressed him from the moment when he first set foot in the house.
On the morning of the second day, he had as yet discovered nothing of interest. He first saw Clotilde Destange at two o'clock, when she came to fetch a book from the library. She was a woman of thirty, dark, with slow and silent movements; and her features bore the look of indifference of those who live much within themselves. She exchanged a few words with M. Destange and left the room without so much as glancing at Shears.
The afternoon dragged on monotonously. At five o'clock, M. Destange stated that he was going out. Shears remained alone in the circular gallery that ran round the library, half-way between floor and ceiling. It was growing dark and he was preparing to leave, in his turn, when he heard a creaking sound and, at the same time, felt that there was some one in the room. Minute followed slowly upon minute. And, suddenly, he started: a shadow had emerged from the semidarkness, quite close to him, on the balcony. Was it credible? How long had this unseen person been keeping him company? And where did he come from?
And the man went down the steps and turned in the direction of a large oak cupboard. Crouching on his knees behind the tapestry that covered the rail of the gallery, Shears watched and saw the man rummage among the papers with which the cupboard was crammed. What was he looking for?