The Master looked round the room, just showing his perfect teeth with the perfection of artistic cruelty, exalted for a moment in the enormous simplicity of his success, and then walked across the hall and vanished through an inner door. His two lieutenants, Quayle and Hutton, were left standing at the head of the great army of servants and keepers.

“I hope we shall have no more trouble,” said Dr. Quayle pleasantly enough, and addressing Turnbull, who was leaning heavily upon the back of a chair.

Still looking down, Turnbull lifted the chair an inch or two from the ground. Then he suddenly swung it above his head and sent it at the inquiring doctor with an awful crash which sent one of its wooden legs loose along the floor and crammed the doctor gasping into a corner. MacIan gave a great shout, snatched up the loose chair-leg, and, rushing on the other doctor, felled him with a blow. Twenty attendants rushed to capture the rebels; MacIan flung back three of them and Turnbull went over on top of one, when from behind them all came a shriek as of something quite fresh and frightful.

Two of the three passages leading out of the hall were choked with blue smoke. Another instant and the hall was full of the fog of it, and red sparks began to swarm like scarlet bees.

“The place is on fire!” cried Quayle with a scream of indecent terror. “Oh, who can have done it? How can it have happened?”

A light had come into Turnbull's eyes. “How did the French Revolution happen?” he asked.

“Oh, how should I know!” wailed the other.

“Then I will tell you,” said Turnbull; “it happened because some people fancied that a French grocer was as respectable as he looked.”

Even as he spoke, as if by confirmation, old Mr. Durand re-entered the smoky room quite placidly, wiping the petroleum from his hands with a handkerchief. He had set fire to the building in accordance with the strict principles of the social contract.

But MacIan had taken a stride forward and stood there shaken and terrible. “Now,” he cried, panting, “now is the judgement of the world. The doctors will leave this place; the keepers will leave this place. They will leave us in charge of the machinery and the machine-guns at the windows. But we, the lunatics, will wait to be burned alive if only we may see them go.”