The enormous revenues procured through the means of relics, and the lack of certain means of identifying them, would naturally encourage the imposition of fraud. The crime would not appear so great after one experience, for the perpetrators could readily see that it really made no difference so far as efficacy in the cure of diseases was concerned, whether or not the relics were genuine. The history of some of the relics unfortunately proves them not to be relics at all, or at least not to be the relics which the faithful supposed them to be. Notice a few instances. In a magnificent shrine in the cathedral at Cologne are the skulls of the three kings, or wise men from the East, who brought gifts to the infant Lord. They have rested here since the twelfth century and have been the source of enormous wealth and power to the cathedral chapter. Not to be outdone by the cathedral, for the church of St. Gereon a cemetery has been depopulated, and the bones thus procured have been placed upon the walls and are known as the relics of St. Gereon and his Theband band of martyrs! Further competition arose in the neighboring church of St. Ursula. Another cemetery was despoiled and the bones covering the interior of the walls are known as the relics of St. Ursula and her eleven thousand virgin martyrs. Anatomists now declare that many of the bones are those of men, but this made no more difference in their healing efficacy in the Middle Ages than the fact that the relics of St. Rosalia at Palermo, famed for their healing power, have lately been declared by Professor Buckland, the eminent osteologist, to be the bones of a goat. Two different investigations have been conducted by the French courts concerning the fountain of La Salette, and in both cases the miracles which make the shrine famous were pronounced to be fraudulent. The recent restoration of the cathedral at Trondhjem has revealed a tube in the walls, not unlike the apparatus discovered in the Temple of Isis at Pompeii; the healing power of this sacred spring was augmented by angelic voices which issued from the supposedly solid walls.[50] While the golden age of the therapeutic use of relics was from the sixth to the sixteenth centuries, modern times, with its physicians, hospitals, and drugs, has not been deprived of this method of cure. Mackay, writing in the latter half of the past century, touches this subject. At Port Royal, in Paris, is kept with great care a thorn, which the priests of that seminary assert to be one of the identical thorns that bound the holy head of the Son of God. How it came there, and by whom it was preserved, has never been explained. This is the famous thorn which the long dissensions of the Jansenists and the Molenists have made celebrated, and which worked the miraculous cure upon Mademoiselle Perier, an account of which is so interesting that I give it. The cure occurred on March 14, 1646.