On another day my friend took with him pieces of copper and iron wire about a foot and a half long, bent something into the form of the letter V, with length enough in the horizontal limbs of the figure to form a sufficient _handle_ for either branch of these new-fashioned divining forks. He found that these instruments moved quite as freely in Mrs. R.'s hands as the hazel fork had done. Then he coated the two handles of one of them with sealing-wax, leaving, however, the extreme ends free and uncovered. When Mrs. R. used the rod so prepared, grasping it by the parts alone which were coated with sealing-wax, and walked over the same piece of ground as before, the wires exhibited no movement whatever. As often, however, as, with no greater change than touching the free ends of the wire with her thumbs, Mrs. R. established again a direct contact with the instrument, it again moved. The motion again ceased, as often as that direct contact was interrupted. This simple narrative, made to me by the late Mr. George Fairholm, carried conviction to my mind of the reality of the phenomenon. I asked my friend why he had not pursued the subject further. He said he had often thought of doing so; and had, he believed, been mainly prevented by meeting with a work of the Count de Tristan, entitled, "Recherches sur quelques Effluves Terrestres," published at Paris in 1826, in which facts similar to those which he had himself verified were narrated, and a vast body of additional curious experiments detailed. At my friend's instance, I sent to Paris for the book, which I have, however, only recently read through. I recommend it to your perusal, if the subject should happen to interest your wayward curiosity. Any thing like an elaborate analysis of it is out of the question in a letter of this sort; but I shall borrow from it a few leading facts and observations, which, at all events, will surprise you. I am afraid, after all, I should have treated the Count as a visionary, and not have yielded to his statements the credence they deserve, but for the good British evidence I had already heard in favour of their trustworthiness; and still I suspect that I should have imagined many of the details fanciful had I perused them at an earlier period than the present; for, it is but lately that I have read Von Reichenbach's experiments on the action of crystals, and of what not, upon sensitive human bodies; a series of phenomena utterly unlike those explored by the Count de Tristan, but which have, nevertheless, the most curious analogy and interesting points of contact with them, confirmatory of the truth of both. But permit me to introduce you to the Count: he shall tell you his own tale in his own way; but as he does not speak English, at least in his book, I must serve as dragoman.