“Three days ago.”

“You are sure it was tetanus?”

“Dead sure.”

“It couldn’t have been a case of strychnine poisoning, for instance?”

“No, Monsieur Poirot. I see what you’re getting at. But it was a clear case of tetanus.”

“Did you not inject anti-serum?”

“Certainly we did,” said the doctor dryly. “Every conceivable thing that could be done was tried.”

“Had you the anti-serum with you?”

“No. We procured it from Cairo.”

“Have there been any other cases of tetanus in the camp?”