So M. Floçon, 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. Floçon 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. Floçon 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, narcotized, 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.