With him they may now ask: How did the murderer escape from The Yellow Room?
Before mounting the three steps leading up to the door of the pavilion, Rouletabille stopped and asked Monsieur Darzac point blank: "What was the motive for the crime ?" "Speaking for myself, Monsieur, there can be no doubt on the matter," said Mademoiselle Stangerson's fiance, greatly distressed.

"The nails of the fingers, the deep scratches on the chest and throat of Mademoiselle Stangerson show that the wretch who attacked her attempted to commit a frightful crime.

The medical experts who examined these traces yesterday affirm that they were made by the same hand as that which left its red imprint on the wall; an enormous hand, Monsieur, much too large to go into my gloves," he added with an indefinable smile.
"Could not that blood-stained hand," I interrupted, "have been the hand of Mademoiselle Stangerson who, in the moment of falling, had pressed it against the wall, and, in slipping, enlarged the impression ?" "There was not a drop of blood on either of her hands when she was lifted up," replied Monsieur Darzac.
"We are now sure," said I, "that it was Mademoiselle Stangerson who was armed with Daddy Jacques's revolver, since she wounded the hand of the murderer.

She was in fear, then, of somebody or something." "Probably." "Do you suspect anybody ?" "No," replied Monsieur Darzac, looking at Rouletabille.

Rouletabille then said to me: "You must know, my friend, that the inquiry is a little more advanced than Monsieur de Marquet has chosen to tell us.