Caution was drilled into them. For they were not the first masters of Astra, nor were they the masters now. There were the ruins left by Those Others, the race who had populated this planet until their own wars had completed their downfall. And the mermen, with their traditions of slavery and dark beginnings in the experimental pens of the older race, continued to insist that across the sea--on the unknown western continent--Those Others still held onto the remnants of a degenerate civilization. Thus the explorers from Homeport went out by ones and twos and used the fauna of the land as a means of gathering information. Hoppers could remember yesterday only dimly, and instinct took care of tomorrow. But what happened today sped from hopper to hopper and could warn by mind touch both merman and human. If one of the dread snake-devils of the interior was on the hunting trail, the hoppers sped the warning. Their vast curiosity brought them to the fringe of any disturbance, and they passed the reason for it along. Dalgard knew there were a thousand eyes at his service whenever he wanted them. There was little chance of being taken by surprise, no matter how dangerous this journey north might be. "The city--" He formed the words in his mind even as he spoke them aloud. "How far are we from it?" The merman hunched his slim shoulders in the shrug of his race. "Three days' travel, maybe five. And it"--though his furred face displayed no readable emotion, the sensation of distaste was plain--"was one of the accursed ones. To such we have not returned since the days of falling fire--" Dalgard was well acquainted with the ruins which lay not many miles from Homeport. And he knew that that sprawling, devastated metropolis was not taboo to the merman. But this other mysterious settlement he had recently heard of was still shunned by the sea people. Only Sssuri and a few others of youthful years would consider a journey to explore the long-forbidden section their traditions labeled as dangerous land. The belief that he was about to venture into questionable territory had made Dalgard evasive when he reported his plans to the Elders three days earlier. But since such trips were, by tradition, always thrusts into the unknown, they had not questioned him too much. All in all, Dalgard thought, watching Sssuri flake the firm pink flesh from the fish, he might deem himself lucky and this quest ordained. He went off to hack out armloads of grass and fashion the sleep mats for the sun-warmed ground. They had eaten and were lounging in content on the soft sand just beyond the curl of the waves when Sssuri lifted his head from his folded arms as if he listened. Like all those of his species, his vestigial ears were hidden deep in his fur and no longer served any real purpose; the mind touch served him in their stead. Dalgard caught his thought, though what had aroused his companion was too rare a thread to trouble his less acute senses.