At eleven o'clock Mrs. Weinberger decided to go to her own room and go to bed. When she had gone, Mary Louise turned off the light and the radio and closed her door. Pulling a comfortable chair close beside the keyhole, she sat down to wait and to listen for Pauline's and Mary's return. The elevators clicked more frequently as midnight approached; more and more guests returned to their rooms. Mary Louise watched them all until she saw Pauline Brooks and Mary Green come along the passageway. They were in high spirits, laughing and talking noisily without any regard for the sleepers in the hotel. Even through the thick walls, Mary Louise could hear them as they prepared for bed. But in half an hour all was quiet. Both girls were asleep, no doubt--and Mary Louise believed that she had had all her trouble for nothing. She sighed and dozed in her chair. However, she was not used to sleeping sitting up, and every little noise in the hall aroused her attention. She heard a man come along at two o'clock, and another at half-past. And a little after three she identified the muffled sound of the door of the next room opening! Leaning forward tensely, she glued her eye to the keyhole. Two young men emerged from the girls' room and staggered about unsteadily, as if they were drunk. Two very small men, who somehow looked more like masqueraders than real men, although they were correctly dressed, except for the fact that they wore their caps instead of hats and had not taken them off in the hotel. In spite of their apparently intoxicated condition they walked silently across the hall to room 614. Very cautiously one of them took a key from his pocket, and after a moment or two, he opened the door. Both young men entered the room, but Mary Louise saw that they did not turn on the light as they went in. "There's something queer about that," she thought. And then she remembered the burglar who had entered her own room at Stoddard House and had stolen her watch. He was very like these young men--short and slight and wore a cap. Perhaps these were Pauline's accomplices! Cautiously she moved her chair aside and slipped out of her room. In another moment she had reached the sitting room where Mr. Hayden, the detective, was dozing over a newspaper. "Come with me!" she said briefly, leading him to room 614. "I saw two young men enter this room a couple of minutes ago." The detective knocked gently on the door. There was no reply. He knocked again. The startled voice of a man called out, "What do you want?" "I'm the hotel detective," answered Mr. Hayden. "I'm sorry to disturb you, but please open the door." A light flashed on in the room, and an elderly man, now clad in his dressing gown, admitted Mary Louise and Mr. Hayden. "This young lady thinks she saw two young men come in here five minutes ago," explained the latter. "Were you asleep, sir?" "Yes," was the reply. "Your knock waked me up."