“Don’t you see,” he explained, pointing a little awkwardly like a child, “he was thrown down from there?”

Gilder frowningly scrutinised the window, and then said: “Well, it is certainly possible. But I don’t see why you are so sure about it.”

Brown opened his grey eyes wide. “Why,” he said, “there’s a bit of rope round the dead man’s leg. Don’t you see that other bit of rope up there caught at the corner of the window?”

At that height the thing looked like the faintest particle of dust or hair, but the shrewd old investigator was satisfied. “You’re quite right, sir,” he said to Father Brown; “that is certainly one to you.”

Almost as he spoke a special train with one carriage took the curve of the line on their left, and, stopping, disgorged another group of policemen, in whose midst was the hangdog visage of Magnus, the absconded servant.

“By Jove! they’ve got him,” cried Gilder, and stepped forward with quite a new alertness.

“Have you got the money!” he cried to the first policeman.

The man looked him in the face with a rather curious expression and said: “No.” Then he added: “At least, not here.”

“Which is the inspector, please?” asked the man called Magnus.

When he spoke everyone instantly understood how this voice had stopped a train. He was a dull-looking man with flat black hair, a colourless face, and a faint suggestion of the East in the level slits in his eyes and mouth. His blood and name, indeed, had remained dubious, ever since Sir Aaron had “rescued” him from a waitership in a London restaurant, and (as some said) from more infamous things. But his voice was as vivid as his face was dead. Whether through exactitude in a foreign language, or in deference to his master (who had been somewhat deaf), Magnus’s tones had a peculiarly ringing and piercing quality, and the whole group quite jumped when he spoke.