Leaning on the wall, to prevent himself from falling, he had made his way to Mademoiselle Stangerson's room, while we were running after the supposed murderer.

The ante-room door was open and when he entered he found Mademoiselle Stangerson lying partly thrown over the desk.
Her dressing-gown was dyed with the blood flowing from her bosom.

Still under the influence of the drug, he felt he was walking in a horrible nightmare.
He went back to the gallery automatically, opened a window, shouted his order to fire, and then returned to the room.

He crossed the deserted boudoir, entered the drawing-room, and tried to rouse Monsieur Stangerson who was lying on a sofa.

Monsieur Stangerson rose stupidly and let himself be drawn by Rouletabille into the room where, on seeing his daughter's body, he uttered a heart-rending cry.