“Why shouldn’t we?  It’s right the conductor, or chief of the train, or whatever you call him, should know what has happened.”

“Why, man, can’t you see?  While the train is travelling express, every one must stay on board it; if it slows, it is possible to leave it.”

“Who would want to leave it?”

“Oh, I don’t know,” said the General, rather testily.  “Any way, the thing’s done now.”

The train had pulled up in obedience to the signal of alarm given by some one in the sleeping-car, but by whom it was impossible to say.  Not by the porter, for he seemed greatly surprised as the conductor came up to him.

“How did you know?” he asked.

“Know!  Know what?  You stopped me.”

“I didn’t.”

“Who rang the bell, then?”

“I did not.  But I’m glad you’ve come.  There has been a crime—­murder.”

“Good Heavens!” cried the conductor, jumping up on to the car, and entering into the situation at once.  His business was only to verify the fact, and take all necessary precautions.  He was a burly, brusque, peremptory person, the despotic, self-important French official, who knew what to do—­as he thought—­and did it without hesitation or apology.

“No one must leave the car,” he said in a tone not to be misunderstood.  “Neither now, nor on arrival at the station.”

There was a shout of protest and dismay, which he quickly cut short.

“You will have to arrange it with the authorities in Paris; they can alone decide.  My duty is plain:  to detain you, place you under surveillance till then.  Afterwards, we will see.  Enough, gentlemen and madame”—­

He bowed with the instinctive gallantry of his nation to the female figure which now appeared at the door of her compartment.  She stood for a moment listening, seemingly greatly agitated, and then, without a word, disappeared, retreating hastily into her own private room, where she shut herself in.

Almost immediately, at a signal from the conductor, the train resumed its journey.  The distance remaining to be traversed was short; half an hour more, and the Lyons station, at Paris, was reached, where the bulk of the passengers—­all, indeed, but the occupants of the sleeper—­descended and passed through the barriers.  The latter were again desired to keep their places, while a posse of officials came and mounted guard.  Presently they were told to leave the car one by one, but to take nothing with them.  All their hand-bags, rugs, and belongings were to remain in the berths, just as they lay.  One by one they were marched under escort to a large and bare waiting-room, which had, no doubt, been prepared for their reception.

Here they took their seats on chairs placed at wide intervals apart, and were peremptorily forbidden to hold any communication with each other, by word or gesture.  This order was enforced by a fierce-looking guard in blue and red uniform, who stood facing them with his arms folded, gnawing his moustache and frowning severely.