"I wouldn't bother about firearms, if I were you, sir," Arnold interrupted. "I can promise you that while I am in this office no one will touch you or harm you in any way. I would rather rely upon my fists any day."

Mr. Weatherley nodded.

"I am glad to hear you say so. A strong young man like you need have no fear, of course. You understand, Chetwode, not a word in the outer office."

"Certainly not, sir," Arnold promised. "You can rely entirely upon my discretion. You will perhaps tell Mr. Jarvis that I am to do my work in here. Fortunately, I know a little shorthand, so if you like I can take the letters down. It will make my presence seem more reasonable."

Mr. Weatherley leaned back in his chair and lit a cigar. He was recovering slowly.

"A very good idea, Chetwode," he said. "I will certainly inform Mr. Jarvis. Poor Rosario!" he went on thoughtfully. "And to think that he might have been warned. If only I had told you to wait outside the restaurant!"

"Do you know who it was who telephoned to you, sir?" Arnold asked.

"No idea—no idea at all," Mr. Weatherley declared. "Some one rang up and told me that Mr. Rosario was engaged to lunch in the Grill Room with my wife. I don't know who it was—didn't recognize the voice from Adam—but the person went on to say that it would be a very great service indeed to Mr. Rosario if some one could stop him from lunching there to-day. Can't think why they telephoned to me."

"If Mr. Rosario were lunching with your wife," Arnold pointed out, "it would be perfectly easy for her to get him to go somewhere else if she knew of the message, whereas he might have refused an ordinary warning."

"You haven't heard the motive even hinted at, I suppose?" Mr. Weatherley asked.