He gambled that Rowena would use the same route back to the chamber of the Sangraal that they had used in leaving it--actually, she had no other choice--and he encephalo-guided Easy Money at a fast trot in the direction of the river in the hope of overtaking her before she reached the entrance to the subterranean passage. However, the hope did not materialize, and he saw no sign of her till he reached the entrance himself. Strictly speaking, he saw no sign of her then either, but he did discern several dislodged stones that could have been thrown up by the black rohorse's hoofs. [Illustration] Entering the passage, he frowned. Until that moment, the incongruity of a sixth-century damosel encephalo-guiding a twenty-second century rohorse had not struck him. After a moment, though, he had to admit that the incongruity was not as glaring as it had at first seemed. "Encephalopathing" was merely a glorified term for "thinking," and Rowena, shortly after mounting Perfidion's steed, must have made the discovery that she had only to think where she wanted to go in order for the rohorse to take her there. He had not remembered to bring a light, nor did he need one. The infra-red rays of Easy Money's eye units were more than sufficient for the task on hand, and overtaking the girl would have been as easy as rolling off a log--if she hadn't been riding a rohorse, too. Overtaking her wasn't of paramount importance anyway: he could confiscate the Sangraal after she returned it just as easily as he could before. The odd part about the whole thing was that Mallory never once thought of the inevitable overlap till he saw the flicker of torchlight up ahead. An instant later he heard the sound of a woman's voice, and instinctively he encephalo-guided Easy Money into a nearby shallow cave. * * * * * [Illustration]