Here he found himself a good deal below the level of the car. These sleepers have no foot-boards like ordinary carriages; access to them is gained from a platform by the steps at each end. The Chief was short of stature, and he could only approach the window outside by calling one of the guards and ordering him to make the small ladder (faire la petite echelle). This meant stooping and giving a back, on which little M. Flocon climbed nimbly, and so was raised to the necessary height.

A close scrutiny revealed nothing unusual. The exterior of the car was encrusted with the mud and dust gathered in the journey, none of which appeared to have been disturbed.

M. Flocon re-entered the carriage neither disappointed nor pleased; his mind was in an open state, ready to receive any impressions, and as yet only one that was at all clear and distinct was borne in on him.

This was the presence of the lace and the jet beads in the theatre of the crime. The inference was fair and simple. He came logically and surely to this:

1. That some woman had entered the compartment.

2. That whether or not she had come in before the crime, she was there after the window had been opened, which was not done by the murdered man.

3. That she had leaned out, or partly passed out, of the window at some time or other, as the scrap of lace testified.

4. Why had she leaned out? To seek some means of exit or escape, of course.

But escape from whom? from what? The murderer? Then she must know him, and unless an accomplice (if so, why run from him?), she would give up her knowledge on compulsion, if not voluntarily, as seemed doubtful, seeing she (his suspicions were consolidating) had not done so already.

But there might be another even stronger reason to attempt escape at such imminent risk as leaving an express train at full speed. To escape from her own act and the consequences it must entail-escape from horror first, from detection next, and then from arrest and punishment.

All this would imperiously impel even a weak woman to face the worst peril, to look out, lean out, even try the terrible but impossible feat of climbing out of the car.

So M. Flocon, by fair process of reasoning, reached a point which incriminated one woman, the only woman possible, and that was the titled, high-bred lady who called herself the Contessa di Castagneto.

This conclusion gave a definite direction to further search. Consulting the rough plan which he had constructed to take the place of the missing train card, he entered the compartment which the Countess had occupied, and which was actually next door.

It was in the tumbled, untidy condition of a sleeping-place but just vacated. The sex and quality of its recent occupant were plainly apparent in the goods and chattels lying about, the property and possessions of a delicate, well-bred woman of the world, things still left as she had used them last-rugs still unrolled, a pair of easy-slippers on the floor, the sponge in its waterproof bag on the bed, brushes, bottles, button-hook, hand-glass, many things belonging to the dressing-bag, not yet returned to that receptacle. The maid was no doubt to have attended to all these, but as she had not come, they remained unpacked and strewn about in some disorder.

M. Flocon pounced down upon the contents of the berth, and commenced an immediate search for a lace scarf, or any wrap or cover with lace.

He found nothing, and was hardly disappointed. It told more against the Countess, who, if innocent, would have no reason to conceal or make away with a possibly incriminating possession, the need for which she could not of course understand.

Next, he handled the dressing-bag, and with deft fingers replaced everything.

Everything was forthcoming but one glass bottle, a small one, the absence of which he noted, but thought of little consequence, till, by and by, he came upon it under peculiar circumstances.

Before leaving the car, and after walking through the other compartments, M. Flocon made an especially strict search of the corner where the porter had his own small chair, his only resting-place, indeed, throughout the journey. He had not forgotten the attendant's condition when first examined, and he had even then been nearly satisfied that the man had been hocussed, narcotised, drugged.

Any doubts were entirely removed by his picking up near the porter's seat a small silver-topped bottle and a handkerchief, both marked with coronet and monogram, the last of which, although the letters were much interlaced and involved, were decipherable as S.L.L.C.

It was that of the Countess, and corresponded with the marks on her other belongings. He put it to his nostril, and recognized at once by its smell that it had contained tincture of laudanum, or some preparation of that drug.

M. Flocon was an experienced detective, and he knew so well that he ought to be on his guard against the most plausible suggestions, that he did not like to make too much of these discoveries. Still, he was distinctly satisfied, if not exactly exultant, and he went back towards the station with a strong predisposition against the Contessa di Castagneto.

Just outside the waiting-room, however, his assistant, Galipaud, met him with news which rather dashed his hopes, and gave a new direction to his thoughts.

The lady's maid was not to be found.

"Impossible!" cried the Chief, and then at once suspicion followed surprise.

"I have looked, monsieur, inquired everywhere; the maid has not been seen. She certainly is not here."

"Did she go through the barrier with the other passengers?"

"No one knows; no one remembers her; not even the conductor. But she has gone. That is positive."

"Yet it was her duty to be here; to attend to her service. Her mistress would certainly want her-has asked for her! Why should she run away?"

This question presented itself as one of infinite importance, to be pondered over seriously before he went further into the inquiry.

Did the Countess know of this disappearance?

She had asked imploringly for her maid. True, but might that not be a blind? Women are born actresses, and at need can assume any part, convey any impression. Might not the Countess have wished to be dissociated from the maid, and therefore have affected complete ignorance of her flight?

"I will try her further," said M. Flocon to himself.

But then, supposing that the maid had taken herself off of her own accord? Why was it? Why had she done so? Because-because she was afraid of something. If so, of what? No direct accusation could be brought against her on the face of it. She had not been in the sleeping-car at the time of the murder, while the Countess as certainly was; and, according to strong presumption, in the very compartment where the deed was done. If the maid was afraid, why was she afraid?

Only on one possible hypothesis. That she was either in collusion with the Countess, or possessed of some guilty knowledge tending to incriminate the Countess and probably herself. She had run away to avoid any inconvenient questioning tending to get her mistress into trouble, which would react probably on herself.

"We must press the Countess on this point closely; I will put it plainly to M. le Juge," said the detective, as he entered the private room set apart for the police authorities, where he found M. Beaumont le Hardi, the instructing judge, and the Commissary of the Quartier (arrondissement).

A lengthy conference followed among the officials. M. Flocon told all he knew, all he had discovered, gave his views with all the force and fluency of a public prosecutor, and was congratulated warmly on the progress he had made.

"I agree with you, sir," said the instructing judge: "we must have in the Countess first, and pursue the line indicated as regards the missing maid."