“A friend of yours, I think?”

“Of mine?”

The man seemed startled.

“You had a prolonged conversation with him in Johannesburg yesterday.”

“A man came up and questioned me about your movements and those of Colonel Race. I gave him misleading information.”

“Excellent, my dear fellow, excellent,” said Sir Eustace genially. “My mistake.”

I chanced to look at Chichester-Pettigrew as he left the room. He was white to the lips, as though in deadly terror. No sooner was he outside than Sir Eustace picked up a speaking-tube that rested by his elbow and spoke down it.

“That you, Schwart? Watch Minks. He’s not to leave the house without orders.”

He put the speaking-tube down again and frowned, slightly tapping the table with his hand.

“May I ask you a few questions, Sir Eustace,” I said, after a minute or two of silence.