That was all there was to it. I said I would guard the steps, and Flannigan, having ignited the combination, whatever it was, went downstairs. How was I to know that Bella would come up when she did? Was it my fault that the lamp got too high, and that Flannigan couldn’t hear Jim calling? Or that just as Bella reached the top of the steps Jim should come to the door of the tent, wearing the barrel part of his hot-air cabinet, and yelling for a doctor? Bella came to a dead stop on the upper step, with her mouth open. She looked at Jim, at the inadequate barrel, and from them she looked at me. Then she began to laugh, one of her hysterical giggles, and she turned and went down again. As Jim and I stared at each other we could hear her gurgling down the hall below. She had violent hysterics for an hour, with Anne rubbing her forehead and Aunt Selina burning a feather out of the feather duster under her nose. Only Jim and I understood, and we did not tell. Luckily, the next thing that occurred drove Bella and her nerves from everybody’s mind. At seven o’clock, when Bella had dropped asleep and everybody else was dressed for dinner, Aunt Selina discovered that the house was cold, and ordered Dal to the furnace. It was Dal’s day at the furnace; Flannigan had been relieved of that part of the work after twice setting fire to a chimney. In five minutes Dal came back and spoke a few words to Max, who followed him to the basement, and in ten minutes more Flannigan puffed up the steps and called Mr. Harbison. I am not curious, but I knew that something had happened. While Aunt Selina was talking suffrage to Anne--who said she had always been tremendously interested in the subject, and if women got the suffrage would they be allowed to vote?--I slipped back to the dining room. The table was laid for dinner, but Flannigan was not in sight. I could hear voices from somewhere, faint voices that talked rapidly, and after a while I located the sounds under my feet. The men were all in the basement, and something must have happened. I flew back to the basement stairs, to meet Mr. Harbison at the foot. He was grimy and dusty, with streaks of coal dust over his face, and he had been examining his revolver. I was just in time to see him slip it into his pocket. “What is the matter?” I demanded. “Is any one hurt?” “No one,” he said coolly. “We’ve been cleaning out the furnace.” “With a revolver! How interesting--and unusual!” I said dryly, and slipped past him as he barred the way. He was not pleased; I heard him mutter something and come rapidly after me, but I had the voices as a guide, and I was not going to be turned back like a child. The men had gathered around a low stone arch in the furnace room, and were looking down a short flight of steps, into a sort of vault, evidently under the pavement. A faint light came from a small grating above, and there was a close, musty smell in the air.