The use of the word _light_, in the Scriptures, must not be received in a purely symbolical sense. We shall dwell in light, or we shall dwell in darkness, in proportion as we have shaken off the bonds that chain us to the earth; according, in short, to our moral state, we shall be pure and bright, or impure and dark. Monsieur Arago mentions, in his treatise on lightning and the electrical fluid, that all men are not equally susceptible of it, and that there are different degrees of receptivity, verging from total insensibility to the extreme opposite; and he also remarks that animals are more susceptible to it than men. He says the fluid will pass through a chain of persons, of whom perhaps one (though forming only the second link) will be wholly insensible of the shock. Such persons would be rarely struck by lightning, while another would be in as great danger from a flash as if he were made of metal. Thus it is not only the situation of a man, during a storm, but also his physical constitution, that regulates the amount of his peril. The horse and the dog are particularly susceptible. Now, this varying susceptibility is analogous to, if not the very same, that causes the varying susceptibility to such phenomena as I am treating of; and, accordingly, we know that in all times, horses and dogs have been reputed to have the faculty of seeing spirits: and when persons who have the second-sight see a vision, these animals, if in contact with them, perceive it also, and frequently evince symptoms of great terror. We also here find the explanation of another mystery, namely, what the Germans call _ansteckung_, and the English (skeptics when alluding to these phenomena) _contagion_—meaning simply _contagious fear_; but, as when several persons form a chain, the shock from an electrical machine will pass through the whole of them—so, if one person is in such a state as to become sensible of an apparition or some similar phenomenon, he may be able to communicate that power to another; and thus has arisen the conviction among the highlanders, that a seer, by touching a person near him, enables him frequently to participate in his vision. A little girl, in humble life, called Mary Delves, of a highly nervous temperament, has been frequently punished for saying that the cat was on fire, and that she saw flames issuing from various persons and objects. With regard to the perplexing subject of corpse-lights, there would be little difficulty attending it if they always remained stationary over the graves; but it seems very well established that that is not the case. There are numerous stories, proceeding from very respectable quarters, proving the contrary; and I have heard two from a dignitary of the church, born in Wales, which I will relate:—