In half an hour he was to be on the west of the castle, just under a spot known as the Giant's Grave, and there the four men were to come ashore to him in the dingey. Meantime he was to see old Paton Gorry and generally take the soundings. Thus they parted. Davy found the water low and the ford dry. He crossed it as noiselessly as he could, and reached the rocks of the isle. It was not so dark but he could descry the dim outlines of the ruined castle. A flight of steps ascended from the water's edge to the portcullis. Davy crept up. He had prepared to knock at the old notched door under the arch, but he found it standing open. He stood and listened. At one moment he thought he heard a movement behind him. It was darkest of all under these thick walls. He went on; he passed the doorway that is terrible with the tradition of the Moddey Dhoo. As he went by the door he turned his head to it in the darkness, and once again he thought he heard something stir. This time the sound came from before him. He gasped, and had almost screamed. He stretched his arms toward the sound. There was nothing. All was still once more. Davy stepped forward into the courtyard. His feet fell softly on the grass that grew there. At length he reached the guard-room. Once more he had lifted his hand to knock, and once more he found the door open. He looked into the room. It was empty; a fire burned on the hearth, a form was drawn up in front of it; a pipe lay on a bare deal table. "He has gone down to the cell," Davy told himself, and he made his way to the steps that led to the dungeon. But he stopped again, and his heart seemed to stand still. There could now be no doubt but some one was approaching. There was the faint jingle as of keys. "Paton! Paton!" Davy called, fearfully. There was no answer, but the footsteps came on. "Who is there?" he cried again, in a tremulous whisper. At the next instant a man passed in the darkness, and Davy saw and knew him. It was the Bishop. Davy dropped to his knees. A moment afterward the Bishop was gone through the outer gate and down the steps. His footsteps ceased, and then there were voices, followed by the plash of an oar, and then all was silence once more, save for the thick boom of the sea that came up from the rocks. Davy rose to his feet and turned toward the steps that led down to the door of the dungeon. A light came from below. The door was open also, and, stretching himself full-length on to the ground, Davy could see into the cell. On the floor there was a lantern, and beside it a bundle lay. Dan was there; he was lying on the stone couch; he was alone. Breathless and trembling, Davy rose again and fled out of the old castle and along the rocky causeway to a gullet under the Giant's Grave. There the men were waiting for him.