"This is his accomplice," Hewitt went on, placing the parrot and cage on the hall table, "though I doubt whether there will be any use in charging _him_. Eh, Polly?" The parrot put his head aside and chuckled. "Hullo, Polly!" it quietly gurgled. "Come along!" Sir James Norris was hopelessly bewildered. "Lloyd--Lloyd," he said, under his breath. "Lloyd--and that!" "This was his little messenger, his useful Mercury," Hewitt explained, tapping the cage complacently; "in fact, the actual lifter. Hold him up!" The last remark referred to the wretched Lloyd, who had fallen forward with something between a sob and a loud sigh. The policemen took him by the arms and propped him in his chair. * * * * * "System?" said Hewitt, with a shrug of the shoulders, an hour or two after in Sir James' study. "I can't say I have a system. I call it nothing but common-sense and a sharp pair of eyes. Nobody using these could help taking the right road in this case. I began at the match, just as the Scotland Yard man did, but I had the advantage of taking a line through three cases. To begin with, it was plain that that match, being left there in daylight, in Mrs. Cazenove's room, could not have been used to light the table-top, in the full glare of the window; therefore it had been used for some other purpose--_what_ purpose I could not, at the moment, guess. Habitual thieves, you know, often have curious superstitions, and some will never take anything without leaving something behind--a pebble or a piece of coal, or something like that--in the premises they have been robbing. It seemed at first extremely likely that this was a case of that kind. The match had clearly been _brought in_--because, when I asked for matches, there were none in the stand, not even an empty box, and the room had not been disturbed. Also the match probably had not been struck there, nothing having been heard, although, of course, a mistake in this matter was just possible. This match, then, it was fair to assume, had been lit somewhere else and blown out immediately--I remarked at the time that it was very little burned. Plainly it could not have been treated thus for nothing, and the only possible object would have been to prevent it igniting accidentally. Following on this, it became obvious that the match was used, for whatever purpose, not _as_ a match, but merely as a convenient splinter of wood.