"The square represents the cabin in which the two workmen took refuge. They were sitting almost opposite each other on the seats marked A and B. There is a flash of lightning. One of the men is knocked over, and bears on his right side a picture of the poplar P, which stands one hundred metres away, and is visible by A through the door O, of which the width is one metre. Behind this poplar stands a big pine, a branch of which is also depicted on the man's body. By this same stroke of lightning the other worker, seated at B, is thrown out of the cabin three metres by an opening D, about forty centimetres wide. The two men are alive, and have come out of it with a few days' rest. They saw nothing, heard nothing, and can remember nothing." In the photographs taken by Dr. Tournatoire it is not clear which is the tree, for the poplar, P, does not stand out alone. As the cabin stands under the shade of a pine tree, one is disposed to ask whether the lightning did not strike this pine? But judging by the position of the trees relatively to the man struck, the most likely hypothesis is that the electric discharge came from the point P towards A, and that the poplar as well as the adjacent pine formed a sort of screen, and reproduced their reflection by the agency of some unknown constituent of these Ceraunic Rays, which enable them to photograph things in this way through clothes on to the human body. This assuredly is a more extraordinary effect than those obtained by the cathodic rays or anti-cathodic rays, of which science seems equally unable to give any explanation. Let us proceed with our studies. It is important above all never to take the newspaper narratives on trust without verification. In the month of June, 1897, the following appeared in the newspapers:-- "PHOTOGRAPHIC LIGHTNING.--A _chasseur_ of the 15th battalion, in barracks at Remiremont, was struck by lightning. He was standing upon a mound not far from a grove of pines, in the midst of ferns. Curious to relate, on the occasion of recording the fact of the man's being dead, it was discovered that his body was covered with punctures imprinted on it by the lightning, and representing the nature and aspect of the branches and plants all round him at the time when he was struck." I wrote at once to the _chef de bataillon_ for a precise confirmation of this, and received the following reply:-- "M. le Commandant Joppé, commanding officer of the 15th Battalion of Chasseurs, has handed me your letter of June 14th, and asked me to reply to it.