She and Lenox discussed several models with artistic fervour.

  “I like you,” said Lenox suddenly. “I came up to warn you not to be taken in by Mother, but I think now that there is no need to do that. You are frightfully sincere and upright and all those queer things, but you are not a fool. Oh hell! what is it now?”

  Lady Tamplin’s voice was calling plaintively from the hall:

  “Lenox, Derek has just rung up. He wants to come to dinner tonight. Will it be all right? I mean, we haven’t got anything awkward, like quails, have we?”

  Lenox reassured her and came back into Katherine’s room. Her face looked brighter and less sullen.

  “I’m glad old Derek is coming,” she said; “you’ll like him.”

  “Who is Derek?”

  “He is Lord Leconbury’s son, married a rich American woman. Women are simply potty about him.”

  “Why?”

  “Oh, the usual reason—very good-looking and a regular bad lot. Everyone goes off their head about him.”

  “Do you?”

  “Sometimes I do,” said Lenox, “and sometimes I think I would like to marry a nice curate and live in the country and grow things in frames.” She paused a minute, and then added, “An Irish curate would be best, and then I should hunt.”

  After a minute or two she reverted to her former theme. “There is something queer about Derek. All that family are a bit potty—mad gamblers, you know. In the old days they used to gamble away their wives and their estates, and did most reckless things just for the love of it. Derek would have made a perfect highwayman—debonair and gay, just the right manner.” She moved to the door. “Well, come down when you feel like it.”

  Left alone, Katherine gave herself up to thought. Just at present she felt thoroughly ill at ease and jarred by her surroundings. The shock of the discovery in the train and the reception of the news by her new friends jarred upon her susceptibilities. She thought long and earnestly about the murdered woman. She had been sorry for Ruth, but she could not honestly say that she had liked her. She had divined only too well the ruthless egoism that was the keynote of her personality, and it repelled her.

  She had been amused and a trifle hurt by the other’s cool dismissal of her when she had served her turn. That she had come to some decision, Katherine was quite certain, but she wondered now what that decision had been. Whatever it was, death had stepped in and made all decisions meaningless. Strange that it should have been so, and that a brutal crime should have been the ending of that fateful journey. But suddenly Katherine remembered a small fact that she ought, perhaps, to have told the police—a fact that had for the moment escaped her memory. Was it of any real importance? She had certainly thought that she had seen a man going into that particular compartment, but she realized that she might easily have been mistaken. It might have been the compartment next door, and certainly the man in question could be no train robber. She recalled him very clearly as she had seen him on those two previous occasions—once at the Savoy and once at Cook’s office. No, doubtless she had been mistaken. He had not gone into the dead woman’s compartment, and it was perhaps as well that she had said nothing to the police. She might have done incalculable harm by doing so.

  She went down to join the others on the terrace outside. Through the branches of mimosa, she looked out over the blue of the Mediterranean, and, whilst listening with half an ear to Lady Tamplin’s chatter, she was glad that she had come. This was better than St. Mary Mead.

  That evening she put on the mauvy pink dress that went by the name of soupir d’automne, and after smiling at her reflection in the mirror, went downstairs with, for the first time in her life, a faint feeling of shyness.

  Most of Lady Tamplin’s guests had arrived, and since noise was the essential of Lady Tamplin’s parties, the din was already terrific. Chubby rushed up to Katherine, pressed a cocktail upon her, and took her under his wing.

  “Oh, here you are, Derek,” cried Lady Tamplin, as the door opened to admit the last corner. “Now at last we can have something to eat. I am starving.”

  Katherine looked across the room. She was startled. So this—was Derek, and she realized that she was not surprised. She had always known that she would some day meet the man whom she had seen three times by such a curious chain of coincidences. She thought, too, that he recognized her. He paused abruptly in what he was saying to Lady Tamplin, and went on again as though with an effort. They all went in to dinner, and Katherine found that he was placed beside her. He turned to her at once with a vivid smile.

  “I knew I was going to meet you soon,” he remarked, “but I never dreamt that it would be here. It had to be, you know. Once at the Savoy and once at Cook’s—never twice without three times. Don’t say you can’t remember me or never noticed me. I insist upon your pretending that you noticed me, anyway.”

  “Oh, I did,” said Katherine; “but this is not the third time. It is the fourth time. I saw you on the Blue Train.”

  “On the Blue Train!” Something undefinable came over his manner; she could not have said just what it was. It was as though he had received a check, a setback. Then he said carelessly:

  “What was the rumpus this morning? Somebody had died, hadn’t they?”

  “Yes,” said Katherine slowly; “somebody had died.”

  “You shouldn’t die on a train,” remarked Derek flippantly. “I believe it causes all sorts of legal and international complications, and it gives the train an excuse for being even later than usual.”

  “Mr. Kettering?” A stout American lady, who was sitting opposite, leaned forward and spoke to him with the deliberate intonation of her race. “Mr. Kettering, I do believe you have forgotten me, and I thought you such a perfectly lovely man.”

  Derek leaned forward, answering her, and Katherine sat almost dazed.

  Kettering! That was the name, of course! She remembered it now—but what a strange, ironical situation! Here was this man whom she had seen go into his wife’s compartment last night, who had left her alive and well, and now he was sitting at dinner, quite unconscious of the fate that had befallen her. Of that there was no doubt. He did not know.

  A servant was leaning over Derek, handing him a note and murmuring in his ear. With a word of excuse to Lady Tamplin, he broke it open, and an expression of utter astonishment came over his face as he read; then he looked at his hostess.

  “This is most extraordinary. I say, Rosalie, I am afraid I will have to leave you. The Prefect of Police wants to see me at once. I can’t think what about.”

  “Your sins have found you out,” remarked Lenox.

  “They must have,” said Derek; “probably some idiotic nonsense, but I suppose I shall have to push off to the Prefecture. How dare the old boy rout me out from dinner? It ought to be something deadly serious to justify that,” and he laughed as he pushed back his chair and rose to leave the room.

  Thirteen

  VAN ALDIN GETS A TELEGRAM

  On the afternoon of the 15th February a thick yellow fog had settled down on London. Rufus Van Aldin was in his suite at the Savoy and was making the most of the atmospheric conditions by working double time. Knighton was overjoyed. He had found it difficult of late to get his employer to concentrate on the matters in hand. When he had ventured to urge certain courses, Van Aldin had put him off with a curt word. But now Van Aldin seemed to be throwing himself into work with redoubled energy, and the secretary made the most of his opportunities. Always tactful, he plied the spur so unobtrusively that Van Aldin never suspected it.

  Yet in the middle of this absorption in business matters, one little fact lay at the back of Van Aldin’s mind. A chance remark of Knighton’s, uttered by the secretary in all unconsciousness, had given rise to it. It now festered unseen, gradually reaching further and further forward into Van Aldin’s consciousness, until at last, in spite of himself, he had to yield to its insistence.

  He listened to what Knighton was saying with his usual air
of keen attention, but in reality not one word of it penetrated his mind. He nodded automatically, however, and the secretary turned to some other paper. As he was sorting them out, his employer spoke:

  “Do you mind telling me that over again, Knighton?”

  For a moment Knighton was at a loss.

  “You mean about this, sir?” He held up a closely written Company report.

  “No, no,” said Van Aldin; “what you told me about seeing Ruth’s maid in Paris last night. I can’t make it out. You must have been mistaken.”

  “I can’t have been mistaken, sir; I actually spoke to her.”

  “Well, tell me the whole thing again.”

  Knighton complied.

  “I had fixed up the deal with Bartheimers,” he explained, “and had gone back to the Ritz to pick up my traps preparatory to having dinner and catching the nine o’clock train from the Gare du Nord. At the reception desk I saw a woman whom I was quite sure was Mrs. Kettering’s maid. I went up to her and asked if Mrs. Kettering was staying there.”

  “Yes, yes,” said Van Aldin. “Of course. Naturally. And she told you that Ruth had gone on to the Riviera and had sent her to the Ritz to await further orders there?”

  “Exactly that, sir.”

  “It is very odd,” said Van Aldin. “Very odd, indeed, unless the woman had been impertinent or something of that kind.”

  “In that case,” objected Knighton, “surely Mrs. Kettering would have paid her down a sum of money, and told her to go back to England? She would hardly have sent her to the Ritz.”

  “No,” muttered the millionaire; “that’s true.”

  He was about to say something further, but checked himself. He was fond of Knighton and liked and trusted him, but he could hardly discuss his daughter’s private affairs with his secretary. He had already felt hurt by Ruth’s lack of frankness, and this chance information which had come to him did nothing to allay his misgivings.

  Why had Ruth got rid of her maid in Paris? What possible object or motive could she have had in so doing?

  He reflected for a moment or two on the curious combination of chance. How should it have occurred to Ruth, except as the wildest coincidence, that the first person that the maid should run across in Paris should be her father’s secretary? Ah, but that was the way things happened. That was the way things got found out.

  He winced at the last phrase; it had arisen with complete naturalness to his mind. Was there then “something to be found out?” He hated to put this question to himself; he had no doubt of the answer. The answer was—he was sure of it—Armand de la Roche.

  It was bitter to Van Aldin that a daughter of his should be gulled by such a man, yet he was forced to admit that she was in good company—that other well-bred and intelligent women had succumbed just as easily to the Count’s fascination. Men saw through him, women did not.

  He sought now for a phrase that would allay any suspicion that his secretary might have felt.

  “Ruth is always changing her mind about things at a moment’s notice,” he remarked, and then he added in a would-be careless tone: “The maid didn’t give any—er—reason for this change of plan?”

  Knighton was careful to make his voice as natural as possible as he replied:

  “She said, sir, that Mrs. Kettering had met a friend unexpectedly.”

  “Is that so?”

  The secretary’s practised ears caught the note of strain underlying the seemingly casual tone.

  “Oh, I see. Man or woman?”

  “I think she said a man, sir.”

  Van Aldin nodded. His worst fears were being realized. He rose from his chair, and began pacing up and down the room, a habit of his when agitated. Unable to contain his feelings any longer, he burst forth:

  “There is one thing no man can do, and that is to get a woman to listen to reason. Somehow or other, they don’t seem to have any kind of sense. Talk of woman’s instinct—why, it is well known all the world over that a woman is the surest mark for any rascally swindler. Not one in ten of them knows a scoundrel when she meets one; they can be preyed on by any good-looking fellow with a soft side to his tongue. If I had my way—”

  He was interrupted. A page boy entered with a telegram. Van Aldin tore it open, and his face went a sudden chalky white. He caught hold of the back of a chair to steady himself, and waved the page boy from the room.

  “What’s the matter, sir?”

  Knighton had risen in concern.

  “Ruth!” said Van Aldin hoarsely.

  “Mrs. Kettering?”

  “Killed!”

  “An accident to the train?”

  Van Aldin shook his head.

  “No. From this it seems she has been robbed as well. They don’t use the word, Knighton, but my poor girl has been murdered.”

  “Oh, my God, sir!”

  Van Aldin tapped the telegram with his forefinger.

  “This is from the police at Nice. I must go out there by the first train.”

  Knighton was efficient as ever. He glanced at the clock.

  “Five o’clock from Victoria, sir.”

  “That’s right. You will come with me, Knighton. Tell my man, Archer, and pack your own things. See to everything here. I want to go round to Curzon Street.”

  The telephone rang sharply, and the secretary lifted the receiver.

  “Yes; who is it?”

  Then to Van Aldin:

  “Mr. Goby, sir.”

  “Goby? I can’t see him now. No—wait, we have plenty of time. Tell them to send him up.”

  Van Aldin was a strong man. Already he had recovered that iron calm of his. Few people would have noticed anything amiss in his greeting to Mr. Goby.

  “I am pressed for time, Goby. Got anything important to tell me?”

  Mr. Goby coughed.

  “The movements of Mr. Kettering, sir. You wished them reported to you.”

  “Yes—well?”

  “Mr. Kettering, sir, left London for the Riviera yesterday morning.”

  “What?”

  Something in his voice must have startled Mr. Goby. That worthy gentleman departed from his usual practice of never looking at the person to whom he was talking, and stole a fleeting glance at the millionaire.

  “What train did he go on?” demanded Van Aldin.

  “The Blue Train, sir.”

  Mr. Goby coughed again and spoke to the clock on the mantelpiece.

  “Mademoiselle Mirelle, the dancer from the Parthenon, went by the same train.”

  Fourteen

  ADA MASON’S STORY

  “I cannot repeat to you often enough, Monsieur, our horror, our consternation, and the deep sympathy we feel for you.”

  Thus M. Carrège, the Juge d’Instruction, addressed Van Aldin. M. Caux, the Commissary, made sympathetic noises in his throat. Van Aldin brushed away horror, consternation, and sympathy with an abrupt gesture. The scene was the Examining Magistrate’s room at Nice. Besides M. Carrège, the Commissary, and Van Aldin, there was a further person in the room. It was that person who now spoke.

  “M. Van Aldin,” he said, “desires action—swift action.”

  “Ah!” cried the Commissary, “I have not yet presented you. M. Van Aldin, this is M. Hercule Poirot; you have doubtless heard of him. Although he has retired from his profession for some years now, his name is still a household word as one of the greatest living detectives.”

  “Pleased to meet you, M. Poirot,” said Van Aldin, falling back mechanically on a formula that he had discarded some years ago. “You have retired from your profession?”

  “That is so, Monsieur. Now I enjoy the world.”

  The little man made a grandiloquent gesture.

  “M. Poirot happened to be travelling on the Blue Train,” explained the Commissary, “and he has been so kind as to assist us out of his vast experience.”

  The millionaire looked at Poirot keenly. Then he said unexpectedly:

  “I am a very rich man, M. Poirot.
It is usually said that a rich man labours under the belief that he can buy everything and everyone. That is not true. I am a big man in my way, and one big man can ask a favour from another big man.”

  Poirot nodded a quick appreciation.

  “That is very well said, M. Van Aldin. I place myself entirely at your service.”

  “Thank you,” said Van Aldin. “I can only say call upon me at any time, and you will not find me ungrateful. And now, gentlemen, to business.”

  “I propose,” said M. Carrège, “to interrogate the maid, Ada Mason. You have her here, I understand?”

  “Yes,” said Van Aldin. “We picked her up in Paris in passing through. She was very upset to hear of her mistress’s death, but she tells her story coherently enough.”

  “We will have her in, then,” said M. Carrège.

  He rang the bell on his desk, and in a few minutes Ada Mason entered the room.

  She was very neatly dressed in black, and the tip of her nose was red. She had exchanged her grey travelling gloves for a pair of black suède ones. She cast a look round the Examining Magistrate’s office in some trepidation, and seemed relieved at the presence of her mistress’s father. The Examining Magistrate prided himself on his geniality of manner, and did his best to put her at her ease. He was helped in this by Poirot, who acted as interpreter, and whose friendly manner was reassuring to the Englishwoman.

  “Your name is Ada Mason; is that right?”

  “Ada Beatrice I was christened, sir,” said Mason primly.

  “Just so. And we can understand, Mason, that this has all been very distressing.”

  “Oh, indeed it has, sir. I have been with many ladies and always given satisfaction, I hope, and I never dreamt of anything of this kind happening in any situation where I was.”

  “No, no,” said M. Carrège.

  “Naturally, I have read of such things, of course, in the Sunday papers. And then I always have understood that those foreign trains—” She suddenly checked her flow, remembering that the gentlemen who were speaking to her were of the same nationality as the trains.