“My God!” said Raymond from behind him; “it’s true, then.”

Blunt came straight on till he reached the chair. He bent over the body, and I thought that, like Parker, he was going to lay hold of the dagger hilt. I drew him back with one hand.

“Nothing must be moved,” I explained. “The police must see him exactly as he is now.”

Blunt nodded in instant comprehension. His face was expressionless as ever, but I thought I detected signs of emotion beneath the stolid mask. Geoffrey Raymond had joined us now, and stood peering over Blunt’s shoulder at the body.

“This is terrible,” he said in a low voice.

He had regained his composure, but as he took off the pince-nez he habitually wore and polished them I observed that his hand was shaking.