Another case which has a historic value is the well-known case concerning the assassination of Spencer Perceval, the Chancellor of the Exchequer, in England, which occurred in the lobby of the House of Commons. The persons who have a knowledge of the case report that some nine days before the tragic occurrence a Cornish mine manager, named John Williams, had a vision, three times in succession, in which he saw a small man, dressed in a blue coat and white waistcoat, enter the lobby of the House of Commons; whereupon another man, dressed in a snuff-colored coat, stepped forward, and, drawing a pistol from an inside pocket fired at and shot the small man, the bullet lodging in the left breast. In the vision, Williams turned and asked some bystander the name of the victim; the bystander replied that the stricken man was Mr. Spencer Perceval, the Chancellor of the Exchequer. The valuable feature of the case, from a scientific standpoint, lies in the fact that Williams was very much impressed by his thrice-repeated vision, and was greatly disturbed thereby. His anxiety was so great that he spoke of the matter to several friends, and asked them whether it would not be well for him to go to London for the purpose of warning Mr. Perceval. His friends ridiculed the whole matter, and persuaded him to give up the idea of visiting London for the purpose named. Those who had a knowledge of the vision were greatly startled and shocked when several days afterward the assassination occurred, agreeing in perfect detail with the vision of the Cornishman. The case, vouched for as it was by a number of reliable persons who had been consulted by Williams, attracted much attention at the time, and has since passed into the history of remarkable instances of prevision. In some cases, however, the prevision seems to come as a warning, and in many cases the heeding of the warning has prevented the unpleasant features from materializing as seen in the vision. Up to the point of the action upon the warning the occurrence agree perfectly with the vision--but the moment the warned person acts so as to prevent the occurrence, the whole train of circumstances is broken. There is an occult explanation of this, but it is too technical to mention at this place.