The Mystery of the Blue Train

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 to-night. 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. Every one 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'll 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 compartinent 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 critic. Chubby rushed up to Katherine, passed 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."