"And now let us return to our muttons," said the Prefect leaning forward. "I understand from the President of the Senate that you require my help in a rather delicate and mysterious matter."

"I do not know that the matter is particularly delicate, though it is certainly mysterious," and then Senator Burton explained, in as few and clear words as possible, the business which had brought him there—the disappearance, three days before, of the English artist, John Dampier, and of the present sad plight of Dampier's wife.

Monsieur Beaucourt threw himself back in his chair. His face lit up, it lost its expression of apathetic fatigue; and his first quick questions showed him a keen and clever cross-examiner.

At once he seized on the real mystery, and that though the Senator had not made more of it than he could help. That was the discrepancy in the account given by the Poulains and by Mrs. Dampier respectively as to the lady's arrival at the hotel.

But even Monsieur Beaucourt failed to elicit the fact that Senator Burton's acquaintance with Mrs. Dampier was of such short standing. He assumed that she was a friend of the Burton family, and the Senator allowed the assumption to go by default.

"The story you have told me," the Prefect said at last, "is a very curious story, Monsieur le Sénateur. But here we come across stranger things every day. Still, certain details make the disappearance of this English gentleman rather stranger than usual. I gather that the vanished man's wife is a charming person?"

"Extremely charming!" said the Senator quickly. "And I should say quite truthful—in fact this discrepancy between her account and that of the Poulains has worried and perplexed me very much."

"Do not let that worry you," said the other thoughtfully. "If this young lady, your friend, be telling the truth, it is very probable that the Poulains began to lie in the hope of avoiding trouble for themselves: having lied they found themselves obliged to stick to their story. You see just now our hotel-keepers are coining gold, and they do not like this very pleasant occupation of theirs interrupted, for even the best of reasons. If this gentleman left the hotel the same night that he arrived there—as I can see you yourself are inclined to believe, Monsieur le Sénateur—then you may be sure that the hotel people, even if they did see him for a few moments, would not care to admit that they had done so. I therefore advise that we put them and their account of what took place out of our minds. From what you tell me, you have already done what I may call the usual things?"

"Yes," said Senator Burton frankly. "My son and I have done everything which common sense could suggest to us. Thus we at once gave a description of the missing man to the police station of the quarter where both the Hôtel Saint Ange and Mr. Dampier's studio are situated. But, owing doubtless to the fact that all your officials are just now very busy and very overworked, we did not get quite as much attention paid to the case as I should have liked. I do not feel quite sure even now that the missing man did not meet with a street accident."

"I can ascertain that for you in a moment."