“Ah!” said M. Papopolous, and helped himself to a croissant.
“The police, you understand,” said M. Poirot, “do not enter into the matter. It is a personal affair.”
“One hears rumours,” admitted M. Papopolous cautiously.
“Such as?” prompted Poirot.
“Is there any reason why I should pass them on?”
“Yes,” said Poirot, “I think there is. You may remember, M. Papopolous, that seventeen years ago there was a certain article in your hands, left there as security by a very—er—Prominent Person. It was in your keeping and it unaccountably disappeared. You were, if I may use the English expression, in the soup.”
His eyes came gently round to the girl. She had pushed her cup and plate aside, and with both elbows on the table and her chin resting on her hands was listening eagerly. Still keeping an eye on her he went on:
“I am in Paris at the time. You send for me. You place yourself in my hands. If I restore to you that—article, you say I shall earn your undying gratitude. Eh bien! I did restore it to you.”
A long sigh came from M. Papopolous.
“It was the most unpleasant moment of my career,” he murmured.
“Seventeen years is a long time,” said Poirot thoughtfully, “but I believe that I am right in saying, Monsieur, that your race does not forget.”
“A Greek?” murmured Papopolous, with an ironical smile.
“It was not as a Greek I meant,” said Poirot.
There was a silence, and then the old man drew himself up proudly.
“You are right, M. Poirot,” he said quietly. “I am a Jew. And, as you say, our race does not forget.”
“You will aid me then?”
“As regards the jewels, Monsieur, I can do nothing.”
The old man, as Poirot had done just now, picked his words carefully.
“I know nothing. I have heard nothing. But I can perhaps do you a good turn—that is, if you are interested in racing.”
“Under certain circumstances I might be,” said Poirot, eyeing him steadily.
“There is a horse running at Longchamps that would, I think, repay attention. I cannot say for certain, you understand; this news passed through so many hands.”
He stopped, fixing Poirot with his eye, as though to make sure that the latter was comprehending him.
“Perfectly, perfectly,” said Poirot, nodding.
“The name of the horse,” said M. Papopolous, leaning back and joining the tips of his fingers together, “is the Marquis. I think, but I am not sure, that it is an English horse, eh, Zia?”
“I think so too,” said the girl.
Poirot got up briskly.
“I thank you, Monsieur,” he said. “It is a great thing to have what the English call a tip from the stable. Au revoir, Monsieur, and many thanks.”
He turned to the girl.
“Au revoir, Mademoiselle Zia. It seems to me but yesterday that I saw you in Paris. One would say that two years had passed at most.”
“There is a difference between sixteen and thirty-three,” said Zia ruefully.
“Not in your case,” declared Poirot gallantly. “You and your father will perhaps dine with me one night.”
“We shall be delighted,” replied Zia.
“Then we will arrange it,” declared Poirot, “and now—je me sauve.”
Poirot walked along the street humming a little tune to himself. He twirled his stick with a jaunty air, once or twice he smiled to himself quietly. He turned into the first Bureau de Poste he came to and sent off a telegram. He took some time in wording it, but it was in code and he had to call upon his memory. It purported to deal with a missing scarf-pin, and was addressed to Inspector Japp, Scotland Yard.
Decoded, it was short and to the point. “Wire me everything known about man whose soubriquet is the Marquis.”
XXIII
A New Theory
It was exactly eleven o’clock when Poirot presented himself at Van Aldin’s hotel. He found the millionaire alone.
“You are punctual, M. Poirot,” he said, with a smile, as he rose to greet the detective.
“I am always punctual,” said Poirot. “The exactitude—always do I observe it. Without order and method—”
He broke off. “Ah, but it is possible that I have said these things to you before. Let us come at once to the object of my visit.”
“Your little idea?”
“Yes, my little idea.” Poirot smiled.
“First of all, Monsieur, I should like to interview once more the maid, Ada Mason. She is here?”
“Yes, she’s here.”
“Ah!”
Van Aldin looked at him curiously. He rang the bell, and a messenger was despatched to find Mason.
Poirot greeted her with his usual politeness, which was never without effect on that particular class.
“Good afternoon, Mademoiselle,” he said cheerfully. “Be seated, will you not, if Monsieur permits.”
“Yes, yes, sit down, my girl,” said Van Aldin.
“Thank you, sir,” said Mason primly, and she sat down on the extreme edge of a chair. She looked bonier and more acid than ever.
“I have come to ask you yet more questions,” said Poirot. “We must get to the bottom of this affair. Always I return to the question of the man in the train. You have been shown the Comte de la Roche. You say that it is possible he was the man, but you are not sure.”
“As I told you, sir, I never saw the gentleman’s face. That is what makes it so difficult.”
Poirot beamed and nodded.
“Precisely, exactly. I comprehend well the difficulty. Now, Mademoiselle, you have been in the service of Madame Kettering two months, you say. During that time, how often did you see your master?”
Mason reflected a minute or two, and then said:
“Only twice, sir.”
“And was that near to, or far away?”
“Well once, sir, he came to Curzon Street. I was upstairs, and I looked over the banisters and saw him in the hall below. I was a bit curious like, you understand, knowing the way things—er—were.” Mason finished up with her discreet cough.
“And the other time?”
“I was in the Park, sir, with Annie—one of the housemaids, sir, and she pointed out the master to me walking with a foreign lady.”
Again Poirot nodded.
“Now listen, Mason, this man whom you saw in the carriage talking to your mistress at the Gare
