THE MYSTERY OF THE YELLOW ROOM
overturned table. The corner of the table was itself stained with blood—a tiny stain—hardly visible; but it told me that, on rising from her bed, Mademoiselle Stangerson had fallen heavily and had struck her head on the corner of its marble top.
"I still had to learn, in addition to the name of the assassin, which I did later, the time of the original attack. I learned this from the examination of Mademoiselle Stangerson and her father, though the answers given by the former were well calculated to deceive the examining magistrate—Mademoiselle Stangerson had stated very minutely how she had spent the whole of her time that day. We established the fact that the murderer had introduced himself into the pavilion between five and six o'clock. At a quarter past six the professor and his daughter had resumed their work. At five the professor had been with his daughter, and since the attack took place in the professor's absence from his daughter, I had to find out just when he left her. The professor had stated that at the time when he and his daughter were about to re-enter the laboratory he was met by the keeper and held in conversation about the cutting of some wood and the poachers. Mademoiselle Stangerson was not with him then since the professor said: 'I left the keeper and rejoined my daughter who was at work in the laboratory.'
"It was during that short interval of time that the tragedy took place. That is certain. In my mind's eye I saw Mademoiselle Stangerson re-enter the pavilion, go to her room to take off her hat, and find herself faced by the murderer. He had
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