As usual, Poirot was right. After a short interval, the American film star was ushered in, and we rose to our feet.
Mary Marvell was undoubtedly one of the most popular actresses on the screen. She had only lately arrived in England in company with her husband, Gregory B. Rolf, also a film actor. Their marriage had taken place about a year ago in the States and this was their first visit to England. They had been given a great reception. Every one was prepared to go mad over Mary Marvell, her wonderful clothes, her furs, her jewels, above all one jewel, the great diamond which had been nicknamed, to match its owner, “the Western Star.” Much, true and untrue, had been written about this famous stone which was reported to be insured for the enormous sum of fifty thousand pounds.
All these details passed rapidly through my mind as I joined with Poirot in greeting our fair client.
Miss Marvell was small and slender, very fair and girlish-looking, with the wide innocent blue eyes of a child.
Poirot drew forward a chair for her, and she commenced talking at once.
“You will probably think me very foolish, Monsieur Poirot, but Lord Cronshaw was telling me last night how wonderfully you cleared up the mystery of his nephew’s death, and I felt that I just must have your advice. I dare say it’s only a silly hoax—Gregory says so—but it’s just worrying me to death.”
She paused for breath. Poirot beamed encouragement.
“Proceed, Madame. You comprehend, I am still in the dark.”
“It’s these letters.” Miss Marvell unclasped her handbag, and drew out three envelopes which she handed to Poirot.
The latter scrutinized them closely.
“Cheap paper—the name and address carefully printed. Let us see the inside.” He drew out the enclosure.
I had joined him, and was leaning over his shoulder. The writing consisted of a single sentence, carefully printed like the envelope. It ran as follows:
“The great diamond which is the left eye of the god must return whence it came.”
The second letter was couched in precisely the same terms, but the third was more explicit:
“You have been warned. You have not obeyed. Now the diamond will be taken from you. At the full of the moon, the two diamonds which are the left and right eye of the god shall return. So it is written.”
“The first letter I treated as a joke,” explained Miss Marvell. “When I got the second, I began to wonder. The third one came yesterday, and it seemed to me that, after all, the matter might be more serious than I had imagined.”
“I see they did not come by post, these letters.”
“No; they were left by hand—by a Chinaman. That is what frightens me.”
“Why?”
“Because it was from a Chink in San Francisco that Gregory bought the stone three years ago.”
“I see, madame, that you believe the diamond referred to to be——”
“‘The Western Star,’” finished Miss Marvell. “That’s so. At the time, Gregory remembers that there was some story attached to the stone, but the Chink wasn’t handing out any information. Gregory says he seemed just scared to death, and in a mortal hurry to get rid of the thing. He only asked about a tenth of its value. It was Greg’s wedding present to me.”
Poirot nodded thoughtfully.
“The story seems of an almost unbelievable romanticism. And yet—who knows? I pray of you, Hastings, hand me my little almanac.”
I complied.
“Voyons!” said Poirot, turning the leaves.
“When is the date of the full moon? Ah, Friday next. That is in three days’ time. Eh bien, madame, you seek my advice—I give it to you. This belle histoire may be a hoax—but it may not! Therefore I counsel you to place the diamond in my keeping until after Friday next. Then we can take what steps we please.”
A slight cloud passed over the actress’s face, and she replied constrainedly:
“I’m afraid that’s impossible.”
“You have it with you—hein?” Poirot was watching her narrowly.
The girl hesitated a moment, then slipped her hand into the bosom of her gown, drawing out a long thin chain. She leaned forward, unclosing her hand. In the palm, a stone of white fire, exquisitely set in platinum, lay and winked at us solemnly.
Poirot drew in his breath with a long hiss.
“Épatant!” he murmured. “You permit, madame?” He took the jewel in his own hand and scrutinized it keenly, then restored it to her with a little bow. “A magnificent stone—without a flaw. Ah, cent tonnerres! and you carry it about with you, comme ça!”
“No, no, I’m very careful really, Monsieur Poirot. As a rule it’s locked up in my jewel-case, and left in the hotel safe deposit. We’re staying at the Magnificent, you know. I just brought it along to-day for you to see.”
“And you will leave it with me, n’est-ce pas? You will be advised by Papa Poirot?”
“Well, you see, it’s this way, Monsieur Poirot. On Friday we’re going down to Yardly Chase to spend a few days with Lord and Lady Yardly.”
Her words awoke a vague echo of remembrance in my mind. Some gossip—what was it now? A few years ago Lord and Lady Yardly had paid a visit to the States, rumour had it that his lordship had rather gone the pace out there with the assistance of some lady friends—but surely there was something more, some gossip which coupled Lady Yardly’s name with that of a “movie” star in California—why! it came to me in a flash—of course it was none other than Gregory B. Rolf.
“I’ll let you into a little secret, Monsieur Poirot,” Miss Marvell was continuing. “We’ve got a deal on with Lord Yardly. There’s some chance of our arranging to film a play down there in his ancestral pile.”
“At Yardly Chase?” I cried, interested. “Why, it’s one of the show places of England.”
Miss Marvell nodded.
“I guess it’s the real old feudal stuff all right. But he wants a pretty stiff price, and of course I don’t know yet whether the deal will go through, but Greg and I always like to combine business with pleasure.”
“But—I demand pardon if I am dense, madame—surely it is possible to visit Yardly Chase without taking the diamond with you?”
A shrewd, hard look came into Miss Marvell’s eyes which belied their childlike appearance. She looked suddenly a good deal older.
“I want to wear it down there.”
“Surely” I said suddenly, “there are some very famous jewels in the Yardly collection, a large diamond amongst them?”
“That’s so,” said Miss Marvell briefly.
I heard Poirot murmur beneath his breath: “Ah, c’est comme ça!” Then he said aloud, with his usual uncanny luck in hitting the bull’s-eye (he dignifies it by the name of psychology): “Then you are without doubt already acquainted with Lady Yardly, or perhaps your husband is?”
“Gregory knew her when she was out West three years ago,”