From where he stood he could hear the wheels of Sartoris's chair rattling over the parquet flooring of the hall, he heard the front door open, and the timid voice of a girl speaking. It did not sound like the voice of anybody with evil intent, and just for an instant it occurred to Berrington that perhaps his suspicions had been misplaced. But only for an instant, until the voice spoke again. He had no difficulty now in recognising the voice as that of Beatrice Richford. Berrington was a little staggered, for he had not expected this. He had totally forgotten the letter, but it came flashing back to his mind now, and Mary's promise that no harm should come of it. And yet Mary had either overestimated her powers or placed too low a value on the cunning of her brother. At any rate, there could be no doubt of the fact that the letter had been delivered, and that Beatrice was here in reply to it. "Very good," Berrington said between his teeth. "I will see that no harm comes of this thing. Beatrice has been brought here to be pumped as to her father's papers and the like. Still, thanks to my little adventure to-night I have a pretty good idea what these scoundrels are after. I'll just go as far as the study and see that it is all right." Berrington slipped off his boots and crept along the hall. So far as he could see all was quiet. There was a double door to the study, so that Berrington could not hear much, but the inner door had not been closed. It was only necessary to swing back the baize door to hear all that was taking place in the study. But Berrington decided that he would leave that for the present. It mattered very little what Sartoris said to Beatrice, for the gist of the conversation could easily be gathered from the girl on some future occasion. But opportunities for examining that strange dining-room did not offer themselves at every hour, and Berrington made up his mind to make the best of it. He pulled on his boots again, and set to work. For some time there was nothing to reward his search. The carpet appeared to be intact, the table a solid structure of mahogany. And yet there must be some means of moving that table up and down, much in the same way as the thing used to be done in the case of a certain French king and the lady of his affections. But there was absolutely nothing here to show that anything of the kind had been done. Berrington removed the flowers and the table cloth and looked underneath. So far without success. He rapped in a reflective way on the solid legs and they gave back a clear ringing sound. With a smile of satisfaction, Berrington took a pocket knife from his vest. Then he bent down and slightly scraped one of the solid-looking legs. The edge of the knife turned up and a thin strip of bright gold showed beneath the vanish. The first discovery had been made. The legs of the table were of hollow metal.