“But certainly, but certainly,” said M. Caux, impatiently. “That will do now.”

The conductor withdrew.

“According to the medical evidence,” said the Commissary, “the lady was probably dead before the train reached Lyons. Who then was the murderer? From Mademoiselle’s story, it seems clear that somewhere on her journey she was to meet this man of whom she spoke. Her action in getting rid of the maid seems significant. Did the man join the train at Paris, and did she conceal him in the adjoining compartment? If so, they may have quarrelled, and he may have killed her in a fit of rage. That is one possibility. The other, and the more likely to my mind, is that her assailant was a train robber travelling on the train; that he stole along the corridor unseen by the conductor, killed her, and went off with the red morocco case, which doubtless contained jewels of some value. In all probability he left the train at Lyons, and we have already telegraphed to the station there for full particulars of anyone seen leaving the train.”