Dorrington left the girl and returned to the public-house. As he reached it he perceived a second noticeable thing. Although it was broad daylight, there was now a light behind the solitary window at the top of the side-wall of Naylor's house. Dorrington slipped through the swing-doors of the public-house and watched through the glass. It was a bare room behind the high window--it might have been a bathroom--and its interior was made but dimly visible from outside by the light. A tall, thin woman was setting up an ordinary pair of house-steps in the middle of the room. This done, she turned to the window and pulled down the blind, and as she did so Dorrington noted her very extreme thinness, both of face and body. When the blind was down the light still remained within. Again there seemed some significance in this. It appeared that the thin woman had waited until her servant had gone before doing whatever she had to do in that room. Presently the watcher came again into Gold Street, and from there caught a passing glimpse of the thin woman as she moved busily about the front room over the breakfast parlour. Clearly, then, the light above had been left for future use. Dorrington thought for a minute, and then suddenly stopped, with a snap of the fingers. He saw it all now. Here was something altogether in his way. He would take a daring course. He withdrew once more to the public-house, and ordering another drink, took up a position in a compartment from which he could command a view both of Gold Street and the side turning. The time now, he saw by his watch, was ten minutes to seven. He had to wait rather more than a quarter of an hour before seeing Richard Telfer come walking jauntily down Gold Street, mount the steps, and knock at Naylor's door. There was a momentary glimpse of the thin woman's face at the door, and then Telfer entered. It now began to grow dusk, and in about twenty minutes more Dorrington took to the street again. The room over the breakfast-parlour was clearly the dining-room. It was lighted brightly, and by intent listening the watcher could distinguish, now and again, a sudden burst of laughter from Telfer, followed by the deeper grunts of Naylor's voice, and once by sharp tones that it seemed natural to suppose were the thin woman's. Dorrington waited no longer, but slipped a pair of thick sock-feet over his shoes, and, after a quick look along the two streets, to make sure nobody was near, he descended the area steps. There was no light in the breakfast-parlour. With his knife he opened the window-catch, raised the sash quietly and stepped over the sill, and stood in the dark room within.