“A very lucky thing for Mr. Poole,” said Leon cheerfully. “I feared worse than that——”

From somewhere outside the window came a “snap!”—the sound that a Christmas cracker makes when it is exploded. Leon got up from the table, walked swiftly to the side of the window and jumped out. As he struck the earth, he trod on one of the little bon-bons he had scattered and it cracked viciously under his foot.

There was nobody in sight. He ran swiftly along the grass-plot, slowing his pace as he came to the end of the wall, and then jerked round, gun extended stiffly. Still nobody. Before him was a close-growing box hedge, in which had been cut an opening. He heard the crack of a signal behind him, guessed that it was Meadows, and presently the detective joined him. Leon put his fingers to his lips, leapt the path to the grass on the other side, and dodged behind a tree until he could see straight through the opening in the box hedge. Beyond was a rose-garden, a mass of pink and red and golden blooms.

Leon put his hand in his pocket and took out a black cylinder, fitting it, without taking his eyes from the hedge opening, to the muzzle of his pistol. Meadows heard the dull thud of the explosion before he saw the pistol go up. There was a scatter of leaves and twigs and the sound of hurrying feet. Leon dashed through the opening in time to see a man plunge into a plantation.

“Plop!”

The bullet struck a tree not a foot from the fugitive.

“That’s that!” said Leon, and took off his silencer. “I hope none of the servants heard it, and most of all that Lee, whose hearing is unfortunately most acute, mistook the shot for something else.”

He went back to the window, stopping to pick up such of his crackers as had not exploded.

“They are useful things to put on the floor of your room when you’re expecting to have your throat cut in the middle of the night,” he said pleasantly. “They cost exactly two dollars a hundred, and they’ve saved my life more often than I can count. Have you ever waited in the dark to have your throat cut?” he asked. “It happened to me three times, and I will admit that it is not an experience that I am anxious to repeat. Once in Bohemia, in the city of Prague; once in New Orleans, and once in Ortona.”

“What happened to the assassins?” asked Meadows with a shiver.