"I had been expecting him till I got his wire."

"His wire!" exclaimed Lieutenant Topham. "Did he telegraph to you?"

"Yes: he said he couldn't come."

"May I see that telegram?"

Caution had always been Mr Drummond's most valuable asset.

"Is it important?" he inquired.

"Extremely," said the lieutenant a trifle brusquely.

Mr Drummond went to his desk and handed him the telegram. He could see Topham's eyebrows rise as he read it.

"Thank you," he said when he had finished. "May I keep it?"

Without waiting for permission, he put it in his pocket, and with a grave air said—