He had seen the exploits of the mermen hunters, knew their skill with net and spear. But to scoop a flying thing out of the air was a new problem.

"Not so!" the thought cut across his. "They have used such as this to hunt us before, long ago. We had believed they were all lost. It must be caught and broken, or it will hunt and kill and hunt again, for it does not tire nor can it be beaten from any trail it is set upon. Now—"

"I will do that, for you have the knowledge—" the scout cut in quickly. After his other meeting with the hound he had no liking for the task he had taken on, but there must be bait to draw the box within striking distance.

"Stand upright and move toward those rocks." The mermen changed position, the net, now with stones in certain loops to weigh it, caught in their three-fingered hands.

Dalgard moved, fighting against hunching his shoulders, against hurrying the pace. He saw the shadow of the flitting death, and flung himself down beside the boulder the mermen had pointed out. Then he rolled over, half surprised not to be struck.

The hound was still in the air but over it now was draped the net, the rocks in its fringes weighing it down in spite of its jerky attempts to rise. In its struggles to be free, it might almost have led the watcher to believe that it had intelligence of a sort. Now the mermen were coming out of the stream, picking up rocks as they advanced. And a hail of stones flew through the air, while others of the sea people sprang to catch the dangling ends of the net and drag the captive to earth.

In the end they smashed it completely, burying the remains under a pile of rocks. Then, retrieving their net, they once more fastened Raf into it and turned downstream, as intent as ever upon reaching the sea. Dalgard wondered whether Those Others would ever discover what had become of their hound. Or had it in some way communicated with its masters, so that now they were aware that it had been destroyed. But he was sure they had nothing more to fear, that the way to the sea was open.

In mid-morning of the second day they came out upon shelving sand and saw before them the waves which promised safety and escape to the mermen. Dalgard sat down in the blue-gray sand beside Raf. The sea people had assured him that the stranger was making a good recovery, that within a matter of hours he could be freed from his cocoon of healing.

Dalgard squinted at the sun sparkling on the waves. Where now? To the north where the space ship waited? If what he read in Raf's mind was true the other wanted to leave Astra, to voyage back to that other world which was only a legend to Dalgard, and a black, unhappy legend at that. If the Elders were here, had a chance to contact these men from Terra—Dalgard's eyes narrowed, would they choose to? Another chain of thought had been slowly developing in his mind during these past hours when he had been so closely companioned with the stranger. And almost he had come to a decision which would have seemed very odd even days before.

No, there was no way of suddenly bringing the Elders here, of transferring his burden of decision to them. Dalgard cupped his chin in his hand and tried to imagine what it would be like to shut oneself up in a small metal-walled spacer and set out blindly to leave one world for another. His ancestors had done that, and they had traveled in cold sleep, ignorant of whether they would ever reach their goal. They had been very brave, or very desperate, men.