Much that he told them they could never understand. Sometimes he used words which were unknown to them: at other times he spoke as if repeating sentences or whole speeches that others must have written long ago. But the main outlines of the story were clear, and they took Alvin's thoughts back to the ages of which he had dreamed since his childhood.

             The tale began, like so many others, amid the chaos of the Transition Centuries, when the Invaders had gone but the world was still recovering from its wounds. At that time there appeared in Lys the man who later became known as the Master. He was accompanied by three strange machines—the very ones that were watching them now—which acted as his servants and also possessed definite intelligences of their own. His origin was a secret he never disclosed, and eventually it was assumed that he had come from space, somehow penetrating the blockade of the Invaders. Far away among the stars there might still be islands of humanity which the tide of war had not yet engulfed.

             The Master and his machines possessed powers which the world had lost, and around him he gathered a group of men to whom he taught much wisdom. His personality must have been a very striking one, and Alvin could understand dimly the magnetism that had drawn so many to him. From the dying cities, men had come to Lys in their thousands, seeking rest and peace of mind after the years of confusion. Here among the forests and mountains, Hstening to the Master's words, they found that peace at last.

             At the close of his long life the Master had asked his friends to carry him out into the open so that he could watch the stars. He had waited, his strength waning, until the culmination of the Seven Suns. As he died the resolution with which he had kept his secret so long seemed to weaken, and he babbled many things of which countless books were to be written in future ages. Again and again he spoke of the "Great Ones" who had now left the world but who would surely one day return, and he charged his followers to remain to greet them when they came. Those were his last rational words. He was never again conscious of his surroundings, but just before the end he uttered one phrase that revealed part at least of his secret and had come down the ages to haunt the minds of all who heard it: "/f is lovely to watch the colored shadows on the planets of eternal light. " Then he died.

             So arose the religion of the Great Ones, for a religion it now became. At the Master's death many of his followers broke away, but others remained faithful to his teachings, which they slowly elaborated through the ages. At first they believed that the Great Ones, whoever they were, would soon return to Earth, but that hope faded with the passing centuries. Yet the brotherhood continued, gathering new members from the lands around, and slowly its strength and power increased until it dominated the whole of Southern Lys.

             It was very hard for Alvin to follow the old man's narrative. The words were used so strangely that he could not tell what was truth and what legend—if, indeed, the story held any truth at all. He had only a confused picture of generations of fanatical men, waiting for some great event which they did not understand to take place at some unknown future date.

             The Great Ones never returned. Slowly the power of the movement failed, and the people of Lys drove it into the mountains until it took refuge in Shalmirane. Even then the watchers did not lose their faith, but swore that however long the wait they would be ready when the Great Ones came. Long ago men had learned one way of defying Time, and the knowledge had survived when so much else had been lost. Leaving only a few of their number to watch over Shalmirane, the rest went into the dreamless sleep of suspended animation.

             Their numbers slowly falling as sleepers were awakened to replace those who died, the watchers kept faith with the Master. From his dying words it seemed certain that the Great Ones lived on the planets of the Seven Suns, and in later years attempts were made to send signals into space. Long ago the signaling had become no more than a meaningless ritual, and now the story was nearing its end. In a very little while only the three machines would be left in Shalmirane, watching over the bones of the men who had come here so long ago in a cause that they alone could understand.

             The thin voice died away, and Alvin's thoughts returned to the world he knew. More than ever before the extent of his ignorance overwhelmed him. A tiny fragment of the past had been illuminated for a little while, but now the darkness had closed over it again.

             The world's history was a mass of such disconnected threads, and none could say which were important and which were trivial. This fantastic tale of the Master and the Great Ones might be no more than another of the countless legends that had somehow survived from the civilizations of the Dawn. Yet the three machines were unlike any that Alvin had ever seen. He could not dismiss the whole story, as he had been tempted to do, as a fable built of self-delusion upon a foundation of madness.

             "These machines," he said abruptly, "surely they've been questioned? If they came to Earth with the Master, they must still know his secrets."

             The old man smiled wearily.

             ''They know," he said, "but they will never speak. The Master saw to that before he handed over the control. We have tried times without number, but it is useless."

             Alvin understood. He thought of the Associator in Diaspar, and the seals that Alaine had set upon its knowledge. Even those seals, he now believed, could be broken in time, and the Master Associator must be infinitely more complex than these little robot slaves. He wondered if Rorden, so skilled in unraveling the secrets of the past, would be able to wrest the machines' hidden knowledge from them. But Rorden was far away and would never leave Diaspar.

             Quite suddenly the plan came fully fledged into his mind. Only a very young person could ever have thought of it, and it taxed even Alvin's self-confidence to the utmost. Yet once the decision had been made, he moved with determination and much cunning to his goal.

             He pointed toward the three machines.

             "Are they identical?" he asked. "I mean, can each one do everything, or are they specialized in any way?"

             The old man looked a little puzzled.

             "I've never thought about it," he said. "When I need anything, I ask whichever is most convenient. I don't think there is any difference between them."

             "There can't be a great deal of work for them to do now," Alvin continued innocently. Theon looked a little startled, but Alvin carefully avoided his friend's eye. The old man answered guilelessly.

             "No," he replied sadly, "Shalmirane is very diff"erent now."

             Alvin paused in sympathy: then, very quickly, he began to talk. At first the old man did not seem to grasp his proposal: later, when comprehension came, Alvin gave him no time to interrupt. He spoke of the great storehouses of knowledge in Diaspar, and the skill with which the Keeper of the Records could use them. Although the Master's machines had withstood all other inquirers, they might yield their secrets to Rorden's probing. It would be a tragedy if the chance were missed, for it would never come again.

             Flushed with the heat of his own oratory, Alvin ended his appeal:

             "Lend me one of the machines—you do not need them all. Order it to obey my controls and I will take it to Diaspar. I promise to return it whether the experiment succeeds or not."