"Now here’s where I get busy," he drew the paper toward him and began marking it with long straight lines and little squares. "Miss Darnley is a nice old lady and some talker. We got gassing, as natural as could be, on the horrible suicide of Mr. Harland, so close by. She took me to the window and showed me where his offices were, and told me how it was her habit, every evening as night fell, to sit in that window and watch the lights start out, especially in the Black Eagle Building. She sat there always till half-past six, when the first gong sounded for dinner. And if I took the room I was to be sure and go down then—the food was better—she always did. "By a little skillful jollying—mostly surprise at her powers of observation and memory—I got from her some significant facts about the lights on the seventeenth floor of the Black Eagle Building on the night of January fifteenth. The Harland suite—she’d located it from the papers—was lit till she went down to dinner. Wonderful how she’d remembered! How was the floor below—bet a hat she couldn’t remember _that_! She could, and proud as a peacock, gave a demonstration. All dark as it usually was at six, then a light in the fourth window—Azalea Woods Estates, private office. Then that goes out and the three front windows are bright. Just before she goes down to dinner, she notices that every window on the whole sweep of the seventeenth floor is dark except that fourth one—Azalea Woods Estates, private office." He stopped and pushed the paper he’d been drawing on across to George. "Here it is, with the time as I make it marked on each window." Jack and Mr. George leaned down studying the diagram and Mr. Whitney slowly rose and coming up behind them looked at it over their shoulders. All their faces, clear in the lamplight, with O’Mally’s red and proud glancing sideways at the drawing, were intent and frowning. "Let’s see how the thing works out," said Mr. George, taking up a pencil and pulling a sheet of paper toward him. Mr. Whitney straightened up with a sort of tired snort and slouched back to his seat by the fire. Mr. George began, figuring on the paper: "The Azalea Woods Estates were cleared at six—all lights out. At a few minutes after, Harland came down the stairs and entered them, going through to the private office and switching on the light, or meeting someone there who switched it on as he came. Some ten or fifteen minutes later Ford came in. That’s evidently the moment, according to your old lady, when the private office was dark and the other two lit up. Just before 6:30—time when Ford left—the front rooms are all dark again. Good deal of a mess to me." He tilted back in his chair so that he could see his father. "What do you make of it, Governor?" "Let’s hear what O’Mally has to say first," said Mr. Whitney. They couldn’t see his face which was turned to the fire, but I could, and it had a slight, amused smile on it.