That deplorable passion for adventure, which had turned the hope of the last Opposition into a guerrilla warrior in South Africa, but which the Home Secretary of England might have subdued before accepting his portfolio, was by no means a dead volcano as Topham Vinson sallied forth with his extraordinary companion. It was to be noticed that he took with him a thick stick instead of an umbrella, though the deserted streets had become moist with a midnight drizzle. What he expected can only be surmised. But the odds are that it did not include the shriek of a police-whistle in the sedate region of Wigmore Street, and the instantaneous bolting of Doctor Dollar round the first corner to the left! Now, the Secretary of State was one of those men who keep up their games out of a cold-blooded regard for the figure; he considered himself as fit at forty as any man in England, and he gave chase with his usual confidence. But the long-legged doctor would have left him behind with the lamp-posts, but for the fact that he was really tearing toward the sound, not flying from it as his pursuer was so ready to suppose. In a matter of seconds they had both fetched up at a brilliantly lighted house, where a more than usually obese policeman was alternately pounding on the door and splitting the sober welkin with his whistle. "Stop that infernal row!" cried Doctor Dollar, with incensed authority. "Out of the way with you--this is my house!" And the Home Secretary arrived on the scene of an imminent assault on his police, just in time to divert the outraged officer's attention by asking what had happened, while the doctor found his key. "Lord only knows!" said the policeman, kicking some broken glass on one side. "Murder, it sounds like; there's somebody been loosing off----" And even as he spoke somebody loosed off again! The terrific report was followed by screams within and a fresh shower of glass from the fanlight. But by this time Doctor Dollar had his latch-key in the lock. If the door had opened outward, a tangled trio would have fallen into the street; as it was, it hardly would open for the man in white who was struggling with a woman (in red flannel) and a boy (in next to nothing) on the mat. Dollar exclaimed "Barton!" in blank amazement. But it was not the unlucky Barton who had run amuck. "They won't let me at him! They'll get the lot of us shot dead!" he spluttered, with ungrateful objurgations; and then the newcomers grasped the situation. On the stairs, at the end of the narrow passage, they beheld an enormous revolver, against a background of pink sleeping-suit, with a ferocious eye looking down the barrel. The crime doctor slipped in front of the Hogarthian group, and stood between everybody and the armed man--shaking his head with an expression that nobody else could see.