"Well?" she said, with a laugh of amusement, and the quiet monosyllable, falling as it were with a cold splash upon his enjoyment of the little scene, suddenly brought him back to the question which was always latent in his mind. How was Pamela to be awakened? "It's a strange place, London," he said. "No doubt it seems stranger to me, and more full of interesting people and interesting things just because I have come back from very silent and very empty places. But that house always puzzled me. I used to have rooms overlooking this square, high up, over there," and he pointed to the eastern side of the square towards Berkeley Street, "and what we have seen to-night used to take place every night, and at the same hour. The light went up in the room on the second floor, and the truants crept out. Guess where they go to! The Savoy. They go and sit there amongst the lights and the music for half an hour, then they come back to the dark house. They live in the most curious isolation with the most curious regularity. There are three of them altogether: an old man--it is his light, I suppose, which went up on the second floor--and those two. I know who they are. The old man is Sir John Stretton." "Oh!" said Pamela, with interest. "And the two people we saw are his son and his son's wife. I have never met them. In fact, no one meets them. I don't know any one who knows them." "Yes, you do," said Pamela, "I know them." And in her knowledge, although Warrisden did not know it, lay the answer to the problem which so perplexed him. CHAPTER III THE TRUANTS Warrisden turned quickly to Pamela. "You never mentioned them." "No," she replied with a smile. "But there's no mystery in my silence. I simply haven't mentioned them because for two years I have lost sight of them altogether. I used to meet them about, and I have been to their house." "There?" asked Warrisden, with a nod towards the lighted window. "No; but to the house Millie and Mr. Stretton had in Deanery Street. They gave that up two years ago when old Lady Stretton died. I thought they had gone to live in the country." "And all the while they have been living here," exclaimed Warrisden. He had spoken truthfully of himself. The events, and the people with whom he came, however slightly, into contact always had interested and amused him. It was his pleasure to fit his observations together until he had constructed a little biography in his mind of each person with whom he was acquainted. And there was never an incident of any interest within his notice, but he sought the reason for it and kept an eye open for its consequence. "Don't you see how strange the story is?" he went on. "They give up their house upon Lady Stretton's death, and they come to live here with Sir John. That's natural enough. Sir John's an old man. But they live in such seclusion that even their friends think they have retired into the country."