"Here is the door to the courtyard," said Sir Pierre. "I doubt that it has been opened in broad daylight for many years." He selected a key from the ring of the late Count and inserted it into the keyhole. The door swung back, revealing a large crucifix attached to its outer surface. Lord Darcy crossed himself. "Lord in Heaven," he said softly, "what is this?" He looked out into a small shrine. It was walled off from the courtyard and had a single small entrance some ten feet from the doorway. There were four _prie-dieus_--small kneeling benches--ranged in front of the doorway. "If I may explain, your lordship--" Sir Pierre began. "No need to," Lord Darcy said in a hard voice. "It's rather obvious. My lord the Count was quite ingenious. This is a relatively newly-built shrine. Four walls and a crucifix against the castle wall. Anyone could come in here, day or night, for prayer. No one who came in would be suspected." He stepped out into the small enclosure and swung around to look at the door. "And when that door is closed, there is no sign that there is a door behind the crucifix. If a woman came in here, it would be assumed that she came for prayer. But if she knew of that door--" His voice trailed off. "Yes, your lordship," said Sir Pierre. "I did not approve, but I was in no position to disapprove." "I understand." Lord Darcy stepped out to the doorway of the little shrine and took a quick glance about. "Then anyone within the castle walls could come in here," he said. "Yes, your lordship." "Very well. Let's go back up." * * * * * In the small office which Lord Darcy and his staff had been assigned while conducting the investigation, three men watched while a fourth conducted a demonstration on a table in the center of the room. Master Sean O Lochlainn held up an intricately engraved gold button with an Arabesque pattern and a diamond set in the center. He looked at the other three. "Now, my lord, your Reverence, and colleague Doctor, I call your attention to this button." Dr. Pateley smiled and Father Bright looked stern. Lord Darcy merely stuffed tobacco--imported from the southern New England counties on the Gulf--into a German-made porcelain pipe. He allowed Master Sean a certain amount of flamboyance; good sorcerers were hard to come by. "Will you hold the robe, Dr. Pateley? Thank you. Now, stand back. That's it. Thank you. Now, I place the button on the table, a good ten feet from the robe." Then he muttered something under his breath and dusted a bit of powder on the button. He made a few passes over it with his hands, paused, and looked up at Father Bright. "If you will, Reverend Sir?" Father Bright solemnly raised his right hand, and, as he made the Sign of the Cross, said: "May this demonstration, O God, be in strict accord with the truth, and may the Evil One not in any way deceive us who are witnesses thereto. In the Name of the Father and of the Son and of the Holy Spirit. Amen."