"The history of my researches is simply this:--Some twenty years ago, a gentleman who, from his position in society, could have no object to gain by deception, showed to me, for my amusement, the movements of the divining rod. He attributed the motion to the influence of a current of water, which I thought no unlikely supposition. But my attention was rather engaged with the action produced by the influence, let that be what it might. My informant assured me he had met with many others, through whom similar effects were manifested. When I was returned home, and had opportunities of making trials under favourable circumstances, I found that I possessed the same endowment myself. Since then I have induced many to make the experiment; and I have found a fourth, or at all events a fifth of the number, capable of setting the divining rod in motion at the very first attempt. Since that time, during these twenty years, I have often tried my hand, but for amusement only, and desultorily, and without any idea of making the thing an object of scientific investigation. But at length, in the year 1822, being in the country, and removed from my ordinary pursuits, the subject again came across me, and I then determined to ascertain the cause of these phenomena. Accordingly, I commenced a long series of experiments, from 1500 to 1800 in number, which occupied me nearly fifteen months. The results of above 1200 were noted down at the time of their performance." The scene of the Count's operations was in the valley of the Loire, five leagues from Vendome, in the park of the Chateau de Ranac. The surface of ground which gave the desired results, was from 70 to 80 feet in breadth. But there was another spot equally efficient near the Count's ordinary residence at Emerillon, near Clery, four leagues southwest of Orleans, ten leagues south of the Loire, at the commencement of the plains of Sologne. The surface was from north to south, and was about of the same breadth with the other. These _exciting tracts_ form, in general, bands or zones of undetermined, and often very great length. Their breadth is very variable. Some are only three or four feet across, while others are one hundred paces. These tracts are sometimes sinuous and sometimes ramify. To the most susceptible they are broader than to those who are less so. The Count thus describes what happens when a competent person, armed with a hazel fork, walks over these _exciting_ districts.