And if the stranger expected an attack from above, then Travis and Tsoay must be alert. Travis analyzed each feature of the hillside, setting in his mind a picture of every inch of ground they must cross. Just as he had wanted daylight as an ally before, so now was he willing to wait for the shadows of twilight. He closed his eyes in a final check, able to recall the details of the hiding place, knowing that he could reach it when the conditions favored, without mistake. Then he edged back from his vantage point, and raising his fingers to his lips, made a small angry chittering, three times repeated. One of the species inhabiting these heights, as they had noted earlier, was a creature about as big as the palm of a man's hand, resembling nothing so much as a round ball of ruffled feathers, though its covering might actually have been a silky, fluffy fur. Its short legs could cover ground at an amazing speed, and it had the bold impudence of a creature with few natural enemies. This was its usual cry. Tsoay's hand waved Travis on to where the younger man had taken position behind the bleached trunk of a fallen tree. "He hides," Tsoay whispered. "Against trouble from above." Travis added his own observation. "But not us, I think." So Tsoay had come to that conclusion too? Travis tried to gauge the nearness of twilight. There was a period after the passing of Topaz' sun when the dusky light played odd tricks with shadows. That would be the first time for their move. He said as much, and Tsoay nodded eagerly. They sat with their backs to a boulder, the tree trunk serving as a screen, and chewed methodically on ration tablets. There was energy and sustenance in the tasteless squares which would support men, even though their stomachs continued to demand the satisfaction of fresh meat. Taking turns, they dozed a little. But the last banners of Topaz' sun were still in the sky when Travis judged the shadows cover enough. He had no way of knowing how the stranger was armed. Though he used a horse for transportation, he might well carry a rifle and the most modern Terran sidearms. The Apaches' bows were little use for infighting, but they had their knives. However, Travis wanted to take the fugitive unharmed if he could. There was information he must have. So he did not even draw his knife as he started downhill. When he reached a pool of violet dusk at the bottom of the small ravine Naginlta's eyes regarded him knowingly. Travis signaled with his hand and thought out what would be the coyotes' part in this surprise attack. The prick-eared silhouette vanished. Uphill the chitter of a fluff-fur sounded twice--Tsoay was in position. A howl ... wailing ... sobbing ... was heard, one of the keening songs of the _mba'a_. Travis darted forward. He heard the nicker of a frightened horse, a clicking which could have marked the pawing of hoof on gravel, saw the brush hiding the stranger's hole tremble, a portion of it fall away.