She was a brilliant brunette, dark-skinned; but her complexion was of a clear, pale olive, and as soft, as lustrous as pure ivory. Her great eyes, of a deep velvety brown, were saddened by near-tears. She had rich red lips, the only colour in her face, and these, habitually slightly apart, showed pearly-white glistening teeth.

It was difficult to look at this charming woman without being affected by her beauty. M. Flocon was a Frenchman, gallant and impressionable; yet he steeled his heart. A detective must beware of sentiment, and he seemed to see something insidious in this appeal, which he resented.

"Madame, it is useless," he answered gruffly. "I do not make the law; I have only to support it. Every good citizen is bound to that."

"I trust I am a good citizen," said the Countess, with a wan smile, but very wearily. "Still, I should wish to be let off now. I have suffered greatly, terribly, by this horrible catastrophe. My nerves are quite shattered. It is too cruel. However, I can say no more, except to ask that you will let my maid come to me."

M. Flocon, still obdurate, would not even consent to that.

"I fear, madame, that for the present at least you cannot be allowed to communicate with any one, not even with your maid."

"But she is not implicated; she was not in the car. I have not seen her since-"

"Since?" repeated M. Flocon, after a pause.

"Since last night, at Amberieux, about eight o'clock. She helped me to undress, and saw me to bed. I sent her away then, and said I should not need her till we reached Paris. But I want her now, indeed I do."

"She did not come to you at Laroche?"

"No. Have I not said so? The porter,"-here she pointed to the man, who stood staring at her from the other side of the table,-"he made difficulties about her being in the car, saying that she came too often, stayed too long, that I must pay for her berth, and so on. I did not see why I should do that; so she stayed away."

"Except from time to time?"

"Precisely."

"And the last time was at Amberieux?"

"As I have told you, and he will tell you the same."

"Thank you, madame, that will do." The Chief rose from his chair, plainly intimating that the interview was at an end.

He had other work to do, and was eager to get at it. So he left Block to show the Countess back to the waiting-room, and, motioning to the porter that he might also go, the Chief hastened to the sleeping-car, the examination of which, too long delayed, claimed his urgent attention.

It is the first duty of a good detective to visit the actual theatre of a crime and overhaul it inch by inch,-seeking, searching, investigating, looking for any, even the most insignificant, traces of the murderer's hands.

The sleeping-car, as I have said, had been side-tracked, its doors were sealed, and it was under strict watch and ward. But everything, of course, gave way before the detective, and, breaking through the seals, he walked in, making straight for the little room or compartment where the body of the victim still lay untended and absolutely untouched.

It was a ghastly sight, although not new in M. Flocon's experience. There lay the corpse in the narrow berth, just as it had been stricken.

It was partially undressed, wearing only shirt and drawers. The former lay open at the chest, and showed the gaping wound that had, no doubt, caused death, probably instantaneous death. But other blows had been struck; there must have been a struggle, fierce and embittered, as for dear life. The savage truculence of the murderer had triumphed, but not until he had battered in the face, destroying features and rendering recognition almost impossible.

A knife had given the mortal wound; that was at once apparent from the shape of the wound. It was the knife, too, which had gashed and stabbed the face, almost wantonly; for some of these wounds had not bled, and the plain inference was that they had been inflicted after life had sped. M. Flocon examined the body closely, but without disturbing it.

The police medical officer would wish to see it as it was found. The exact position, as well as the nature of the wounds, might afford evidence as to the manner of death.

But the Chief looked long, and with absorbed, concentrated interest, at the murdered man, noting all he actually saw, and conjecturing a good deal more.

The features of the mutilated face were all but unrecognisable, but the hair, which was abundant, was long, black, and inclined to curl; the black moustache was thick and drooping. The shirt was of fine linen, the drawers silk. On one finger were two good rings, the hands were clean, the nails well kept, and there was every evidence that the man did not live by manual labour. He was of the easy, cultured class, as distinct from the workman or operative.

This conclusion was borne out by his light baggage, which still lay about the berth,-hat-box, rugs, umbrella, brown morocco hand-bag. All were the property of some one well to do, or at least possessed of decent belongings. One or two pieces bore a monogram, "F.Q.," the same as on the shirt and under-linen; but on the bag was a luggage label, with the name, "Francis Quadling, passenger to Paris," in full. Its owner had apparently no reason to conceal his name. More strangely, those who had done him to death had been at no pains to remove all traces of his identity.

M. Flocon opened the hand-bag, seeking for further evidence; but found nothing of importance,-only loose collars, cuffs, a sponge and slippers, two Italian newspapers of an earlier date. No money, valuables, or papers. All these had been removed probably, and presumably, by the perpetrator of the crime.

Having settled the first preliminary but essential points, he next surveyed the whole compartment critically. Now, for the first time, he was struck with the fact that the window was open to its full height.

Since when was this? It was a question to be put presently to the porter and any others who had entered the car, but the discovery drew him to examine the window more closely, and with good results.

At the ledge, caught on a projecting point on the far side, partly in, partly out of the car, was a morsel of white lace, a scrap of feminine apparel; although what part, or how it had come there, was not at once obvious to M. Flocon. A long and minute inspection of this bit of lace, which he was careful not to detach as yet from the place in which he found it, showed that it was ragged, and frayed, and fast caught where it hung. It could not have been blown there by any chance air; it must have been torn from the article to which it belonged, whatever that might be,-head-dress, nightcap, night-dress, or handkerchief. The lace was of a kind to serve any of these purposes.

Inspecting further, M. Flocon made a second discovery. On the small table under the window was a short length of black jet beading, part of the trimming or ornamentation of a lady's dress.

These two objects of feminine origin-one partly outside the car, the other near it, but quite inside-gave rise to many conjectures. It led, however, to the inevitable conclusion that a woman had been at some time or other in the berth. M. Flocon could not but connect these two finds with the fact of the open window. The latter might, of course, have been the work of the murdered man himself at an earlier hour. Yet it is unusual, as the detective imagined, for a passenger, and especially an Italian, to lie under an open window in a sleeping-berth when travelling by express train before daylight in March.

Who opened that window, then, and why? Perhaps some further facts might be found on the outside of the car. With this idea, M. Flocon left it, and passed on to the line or permanent way.