Fortunately, however, the chase was not a long one. The car which Peter Ruff had been following was drawn up before a plain, solid-looking house, unlit and of gloomy appearance. The little lady with the wonderful eyes was already halfway up the flagged steps. Hastily lifting the flap and looking behind as they passed, her pursuer saw her open the door with a latchkey, and disappear. Peter Ruff pulled the check-string and descended. For several moments he stood and observed the house into which the lady whom he had been following had disappeared. Then he turned to the driver.
“I want you to watch that house,” he said, “never to take your eyes off it. When I reappear from it, if I do at all, I shall probably be in a hurry. Directly you see me be on your box ready to start. A good deal may depend upon our getting away quickly.”
“Very good, sir,” the man answered. “How long am I to wait here for you?”
Peter Ruff’s lips twisted into a curious little smile.
“Until two o’clock,” he answered. “If I am not out by then, you needn’t bother any more about me. You can return and tell your mistress exactly what has happened.”
“Hadn’t I better come and try and get you out, sir?” the man asked. “Begging your pardon, but her Ladyship told me that there might be queer doings. I’m a bit useful in a scrap, sir,” he added. “I do a bit of sparring regularly.”
Peter Ruff shook his head.
“If there’s any scrap at all,” he said, “you had better be out of it. Do as I have said.”
The motor car had turned round and disappeared now, and in a few moments Peter Ruff stood before the door of the house into which the little lady had disappeared. The problem of entrance was already solved for him. The door had been left unlatched; only a footstool had been placed against it inside. Peter Ruff, without hesitation, pushed the door softly open and entered, replaced the footstool in its former position, and stood with his back to the wall, in the darkest corner of the hall, looking around him—listening intently. Nearly opposite the door of a room stood ajar. It was apparently lit up, but there was no sound of any one moving inside. Upstairs, in one of the rooms on the first floor, he could hear light footsteps—a woman’s voice humming a song. He listened to the first few bars, and understanding became easier. Those first few bars were the opening ones of the Servian national anthem!
With an effort, Peter Ruff concentrated his thoughts upon the immediate present. The little lady was upstairs. The servants had apparently retired for the night. He crept up to the half-open door and peered in. The room, as he had hoped to find it, was empty, but Madame’s easy-chair was drawn up to the fire, and some coffee stood upon the hob. Stealthily Peter Ruff crept in and glanced around, seeking for a hiding place. A movement upstairs hastened his decision. He pushed aside the massive curtains which separated this from a connecting room. He had scarcely done so when light footsteps were heard descending the stairs.