The talk went on to the discovery of a Roman villa in the neighborhood; and soon after I left the room, and sat down apart to wonder at the drawing together of such strange clues of evidence. As the professor had spoken of the curious word, I had caught the glint of his eye upon me; and though the pronunciation he gave was grotesque in the extreme, I recognized the name of the stone of sixty characters mentioned by Solinus, the black seal shut up in some secret drawer of the study, stamped forever by a vanished race with signs that no man could read, signs that might, for all I knew, be the veils of awful things done long ago, and forgotten before the hills were moulded into form. When, the next morning, I came down, I found Professor Gregg pacing the terrace in his eternal walk. "Look at that bridge," he said when he saw me, "observe the quaint and Gothic design, the angles between the arches, and the silvery gray of the stone in the awe of the morning light. I confess it seems to me symbolic; it should illustrate a mystical allegory of the passage from one world to another." "Professor Gregg," I said quietly, "it is time that I knew something of what has happened, and of what is to happen." For the moment he put me off, but I returned again with the same question in the evening, and then Professor Gregg flamed with excitement. "Don't you understand yet?" he cried. "But I have told you a good deal; yes, and shown you a good deal. You have heard pretty nearly all that I have heard, and seen what I have seen; or at least," and his voice chilled as he spoke, "enough to make a good deal clear as noonday. The servants told you, I have no doubt, that the wretched boy Cradock had another seizure the night before last; he awoke me with cries in that voice you heard in the garden, and I went to him, and God forbid you should see what I saw that night. But all this is useless; my time here is drawing to a close; I must be back in town in three weeks, as I have a course of lectures to prepare, and need all my books about me. In a very few days it will be all over, and I shall no longer hint, and no longer be liable to ridicule as a madman and a quack. No, I shall speak plainly, and I shall be heard with such emotions as perhaps no other man has ever drawn from the breasts of his fellows." He paused, and seemed to grow radiant with the joy of great and wonderful discovery. "But all that is for the future, the near future certainly, but still the future," he went on at length. "There is something to be done yet; you will remember my telling you that my researches were not altogether devoid of peril? Yes, there is a certain amount of danger to be faced; I did not know how much when I spoke on the subject before, and to a certain extent I am still in the dark. But it will be a strange adventure, the last of all, the last demonstration in the chain."