“Burnt feet,” said Leon promptly. “If you would like to learn how the coastal intelligence department extract information from unwilling victims, come along.”

Elver hesitated. He was a man burnt up by the Indian suns, wizened like a dried yellow apple, and he had no interest in the world beyond his work.

“I’ll go with you,” he said, stepping into the car. “And if your Barberton man fails you, you can have me as a guest. I like to hear you talking. One cannot know too much of the criminal mind! And life is dull since the snake stopped biting!”

The car made towards Blackfriars Bridge, and Manfred kept watch of the sidewalk. There was no sign of Barberton, and he signalled Leon to turn and come back. This brought the machine to the Embankment side of the broad boulevard. They had passed under Waterloo Bridge and were nearing Cleopatra’s Needle when Gonsalez saw the man they were seeking.

He was leaning against the parapet, his elbows on the coping and his head sunk forward as though he were studying the rush of the tide below. The car pulled up near a policeman who was observing the lounger thoughtfully. The officer recognized the police surgeon and saluted.

“Can’t understand that bird, sir,” he said. “He’s been standing there for ten minutes—I’m keeping an eye on him because he looks to me like a suicide who’s thinkin’ it over!”

Manfred approached the man, and suddenly, with a shock, saw his face. It was set in a grin—the eyes were wide open, the skin a coppery red.

“Elver! Leon!”

As Leon sprang from the car, Manfred touched the man’s shoulder and he fell limply to the ground. In a second the doctor was on his knees by the side of the still figure.

“Dead,” he said laconically, and then: “Good God!”