In this last chapter I would like to group together a series of instances of pictures made by lightning, some of them very curious and attributed, it would seem, to flashes of a special character, which we may perhaps term Ceraunic Rays, from _Keraunos_, lightning. These instances are of great variety, and doubtless admit of many different explanations. Here, then, is a selection worth looking into. In this case, as in so many others, it is extremely difficult to get at the exact truth. Generally speaking, it is from the newspapers that we get the facts--more or less accurately observed, more or less accurately recorded. I have made great efforts to inform myself personally as to the incidents whenever this has been practicable. The _Petit Marseillais_ of June 18, 1896, published the following:-- "A correspondent writes to us from Pertius, June 17:-- "'In the course of the storm here yesterday, two day-labourers of our town, Jean Sasier and Joseph Elisson, took refuge in a cabin constructed of reeds. They were standing at the entrance when they were struck by lightning and thrown violently to the ground. Elisson, who was not much hurt, soon recovered his senses and called for help. People ran up at once and carried the two men to where they live, where all necessary attention was given to them. "'Sasier's condition, though serious enough by reason of a burn on his right side, is not causing anxiety. The curious part of the incident is the effect the electric fluid has produced upon Elisson. The lightning cut open one of his boots and tore his trousers; but over and above this, like a tattooer making use of photography, _it reproduced admirably_ on the artisan's body a representation of a pine tree, of a poplar, and of the handle of his watch. It is an undoubted case of photography through opaque materials; most luckily the sensitive plate--Elisson's body--merely took the impression and received no injury.'" On reading this narrative, I wrote to the Mayor of the Commune of Pertius to ask him for confirmation of it, and for a photograph, if possible, of the picture on Elisson's body. By a fortunate circumstance, the Mayor happened to be the doctor who had attended the victim. Here is his reply:-- "M. Joseph Elisson, of Pertius, aged about thirty-eight, was struck by lightning on June 17. Called to attend to him at about two in the afternoon, I found some superficial burns forming a trail, which began near the teat of his left breast, at the level of his waistcoat pocket, in which there was a watch (which had not stopped), and went down towards the navel, then turned boldly to the right towards the iliac spine and down the outer side of his right leg as far as the ankle, at the level of which his boot, made of strong leather, had been split open.