“My darling!” murmured the young man fondly. “Now, indeed, is our happiness certain. By to-morrow morning we shall be safe from all pursuit.” Then he turned to the Duke. “I need not tell you,” said he, “that you must observe silence on this matter. Oblige me now by going to my room and packing a bag; you’ll know what I shall want for two or three days; I can give you a quarter of an hour.” The Duke stood in momentary hesitation. He was bewildered at the sudden change in the position caused by the appearance of this girl. Was he assisting, then, not at a refined and ingenious burglary, but at another kind of trick? The disguise assumed by the young man might have for its object the deception of a trustful girl, and not an abduction of the Queen Bess flagon. “Well, why don’t you obey?” asked the young man sharply; and, stepping up to the Duke, he thrust a ten-pound note into his hand, whispering, “Play your part, and earn your money, you fool.” The Duke lingered no longer. Leaving the room, he walked straight, rapidly, and with a firm tread, upstairs. When he reached the top he paused to listen. All was still! Stay! A moment later he heard a slight noise--the noise of some metal instrument turning, proceeding from the room which he had just left. The Duke sat down on the landing and took off his boots. Then with silent feet he crept cautiously downstairs again. He paused to listen for an instant outside the sitting-room door. Voices were audible, but he could not hear the words. The occupants of the room were moving about. He heard a low amused laugh. Then he pursued his way to the hall door. He had not completely closed it after admitting the lady, and he now slipped out without a sound. The brougham stood in front of the door. The Duke dodged behind it, and the driver, who was leaning forward on his seat, did not see him. The next moment he was crouching down by the side of his friend the policeman, waiting for the next development in the plot of this comedy, or crime, or whatever it might turn out to be. He put out his hand and touched his ally. To his amusement the man, sitting there on the ground, had fallen fast asleep. “Another proof,” mused the Duke in whimsical despair, “that it is impossible to make any mode of life permanently interesting. How this fellow would despise the state of excitement which I, for the moment, am so fortunate as to enjoy! Well, I won’t wake him unless need arises.” For some little while nothing happened. The policeman slept on, and the driver of the brougham seemed sunk in meditation, unless, indeed, he also were drowsy. The shutters of the sitting-room were again closely shut, and no sound came from behind them. The Duke crouched motionless but keenly observant.