Dr. Bourion had taken pictures of both of the child's eyes as well as both of the mother's eyes. The child's eyes showed nothing but hazy clouds. But the mother's eyes were different. Upon the left eye, next to a circular section back of the iris, a delicately marked image of a dog's head appeared. On the same section of the right eye, another picture; one could see the assassin raising his arm to strike and the dog leaping to protect his little charge. "With much good will, it must be confessed," thought Bernardet, looking again and again at the photograph, "and with much imagination, too. But it was between fifty and fifty-two hours after the murder that the proof was taken, while this time it will be while the body is still warm that the experiment will be tried." Seventeen times already had Dr. Vernois experimented on animals; sometimes just after he had strangled them, again when they had died from Prussic acid. He had held in front of their eyes a simple object which could be easily recognized. He had taken out the eyes and hurried with them to the photographer. He had, in order to better expose the retina to photographic action, made a sort of Maltese cross, by making four incisions on the edge of the sclerotic. He removed the vitreous humor, fixed it on a piece of card with four pins and submitted the retina as quickly as possible to the camera. In re-reading the learned man's report, Bernardet studied, pored over, carefully scrutinized the text, investigated the dozen proofs submitted to the Society of Medical Jurisprudence by Dr. Vernois: Retina of a cat's eye killed by Prussic acid; Vernois had held the animal in front of the bars of the cage in which it was confined. No result! Retina of a strangled dog's eye. A watch was held in front of its eyes. No result! Retina of a dog killed by a strangulation. A bunch of shining keys was held in front of his eyes. No result! Retina of the eye of a strangled dog. An eyeglass held in front of its eyes. Photograph made two hours after death. Nothing! In all Dr. Vernois's experiments--nothing! Nothing! Bernardet repeated the word angrily. Still he kept on; he read page after page. But all this was twenty-six years ago--photography has made great strides since then. What wonderful results have been obtained! The skeleton of the human body seen through the flesh! The instantaneous photograph! The kinetoscopic views! Man's voice registered for eternity in the phonograph! The mysterious dragged forth into the light of day! Many hitherto unknown secrets become common property! The invisible, even the invisible, the occult, placed before our eyes, as a spectacle! "One does not know all that may be done with a kodak," murmured Bernardet.