At the corner of the avenue and the rue de la Pompe, he dismissed the carriage, walked down the street to number 134, and performed the same operations in front of the house of the late Baron d’Hautrec and the two adjoining houses, measuring the width of the respective façades and calculating the depth of the little gardens that stood in front of them.
The avenue was deserted, and was very dark under its four rows of trees, between which, at considerable intervals, a few gas-lamps struggled in vain to light the deep shadows. One of them threw a dim light over a portion of the house, and Sholmes perceived the “To-let” sign posted on the gate, the neglected walks which encircled the small lawn, and the large bare windows of the vacant house.
“I suppose,” he said to himself, “the house has been unoccupied since the death of the baron.... Ah! if I could only get in and view the scene of the murder!”
No sooner did the idea occur to him than he sought to put it in execution. But how could he manage it? He could not climb over the gate; it was too high. So he took from his pocket an electric lantern and a skeleton key which he always carried. Then, to his great surprise, he discovered that the gate was not locked; in fact, it was open about three or four inches. He entered the garden, and was careful to leave the gate as he had found it—partly open. But he had not taken many steps from the gate when he stopped. He had seen a light pass one of the windows on the second floor.
He saw the light pass a second window and a third, but he saw nothing else, except a silhouette outlined on the walls of the rooms. The light descended to the first floor, and, for a long time, wandered from room to room.
“Who the deuce is walking, at one o’clock in the morning, through the house in which the Baron d’Hautrec was killed?” Herlock Sholmes asked himself, deeply interested.
There was only one way to find out, and that was to enter the house himself. He did not hesitate, but started for the door of the house. However, at the moment when he crossed the streak of gaslight that came from the street-lamp, the man must have seen him, for the light in the house was suddenly extinguished and Herlock Sholmes did not see it again. Softly, he tried the door. It was open, also. Hearing no sound, he advanced through the hallway, encountered the foot of the stairs, and ascended to the first floor. Here there was the same silence, the same darkness.
He entered, one of the rooms and approached a window through which came a feeble light from the outside. On looking through the window he saw the man, who had no doubt descended by another stairway and escaped by another door. The man was threading his way through the shrubbery which bordered the wall that separated the two gardens.
“The deuce!” exclaimed Sholmes, “he is going to escape.”
He hastened down the stairs and leaped over the steps in his eagerness to cut off the man’s retreat. But he did not see anyone, and, owing to the darkness, it was several seconds before he was able to distinguish a bulky form moving through the shrubbery. This gave the Englishman food for reflection. Why had the man not made his escape, which he could have done so easily? Had he remained in order to watch the movements of the intruder who had disturbed him in his mysterious work?