It is, however, as a sorcerer, that Gregory VII (Hildebrand) finds a place in this volume. Benno relates that, coming one day from his Alban villa, he found, just as he was entering the church of the Lateran, that he had left behind him his magical book, which he was ascustomed to carry about his person. He immediately sent two trusty servants to fetch it, at the same time threatening them most fearfully if they should attempt to look into the volume. Curiosity however got the better of their fear. They opened the book, and began to read; when presently a number of devils appeared, saying, "We are come to obey your commands, but, if we find ourselves trifled with, we shall certainly fall upon and destroy you." The servants, exceedingly terrified, replied, "Our will is that you should immediately throw down so much of the wall of the city as is now before us." The devils obeyed; and the servants escaped the danger that hung over them. [155] It is further said, that Gregory was so expert in the arts of magic, that he would throw out lightning by shaking his arm, and dart thunder from his sleeve. [156] But the most conspicuous circumstance in the life of Gregory that has been made the foundation of a charge of necromancy against him, is that, when Rodolph marched against Henry IV, the pope was so confident of his success, as to venture publicly to prophesy, both in speech and in writing, that his adversary should be conquered and perish in this campaign. "Nay," he added, "this prophecy shall be accomplished before St. Peter's day; nor do I desire any longer to be acknowledged for pope, than on the condition that this comes to pass." It is added, that Rodolph, relying on the prediction, six times renewed the battle, in which finally he perished instead of his competitor. But this does not go far enough to substantiate a charge of necromancy. It is further remarked, that Gregory was deep in the pretended science of judicial astrology; and this, without its being necessary to have recourse to the solution of diabolical aid, may sufficiently account for the undoubting certainty with which he counted on the event.