"Do your worst," he said huskily, and Colonel Boundary passed out, pocketing the revolver which had come from nowhere into his hand, and presently they heard the purr of the departing motor.

He came to Horsham station in a thoughtful frame of mind. He was still thinking profoundly when he reached Victoria.

Then, as he stepped on the platform, a hand was laid on his arm, and he turned to meet the smiling face of Stafford King.

"Hullo," said the colonel, and something within him went cold.

"Sorry to break in on your reverie, colonel," said Stafford King, "but I've a warrant for your arrest."

"What is the charge?" asked the colonel, his face grey.

"Blackmail and conspiracy," said King, and saw with amazement the look of relief in the other's eyes.

Then:

"Boundary," he said between his teeth, "you thought I wanted you for 'Snow' Gregory!"

The colonel said nothing.