The hyaenodons especially were most discouraging to contemplate. Their bodies were as large as that of a full grown mastiff. They walked upon short, powerful legs and their broad jaws were massive and strong. Dark, shaggy hair covered their backs and sides, turning to white upon their breasts and bellies.

Gnawing hunger assailed Jason Gridley and also an overpowering desire to sleep, convincing him that he must have been many hours away from the O-220, and yet the beasts beneath him continued to feed.

A dead thag lay at the foot of the tree in which the American kept his lonely vigil. So far it had not been fed upon and the nearest tiger was fifty yards away. Gridley was hungry, so hungry that he eyed the thag covetously. He glanced about him, measuring the distance from the tree to the nearest tiger and trying to compute the length of time that it would take him to clamber back to safety should he descend to the ground. He had seen the tigers in action and he knew how swiftly they could cover ground and that one of them could leap almost as high as the branch upon which he sat.

Altogether the chance of success seemed slight for the plan he had in mind in the event that the nearest tiger took exception to it. But great though the danger was, hunger won. Gridley drew his hunting knife and lowered himself gently to the ground, keeping an alert eye upon the nearest tiger. Quickly he sliced several long strips of flesh from the thag's hind quarter.

The tarag feeding fifty yards away looked up. Jason sliced another strip, returned his knife to its sheath and climbed quickly back to safety. The tarag lowered its head upon its kill and closed its eyes.

The American gathered dead twigs and small branches that still clung to the living tree and with them he built a small fire in a great crotch.

Here he cooked some of the meat of the thag; the edges were charred, the inside was raw, but Jason Gridley could have sworn that never before in his life had he tasted such delicious food.

How long his culinary activities employed him, he did not know, but when he glanced down again at the clearing he saw that most of the tigers had quitted their kills and were moving leisurely toward the forest, their distended bellies proclaiming how well they had surfeited themselves. And as the tigers retired, the hyaenodons, the wild dogs and the jackals closed in to the feast.

The hyaenodons kept the others away and Gridley saw another long wait ahead of him; nor was he mistaken. And when the hyaenodons had had their fill and gone, the wild dogs came and kept the jackals away.

In the meantime Gridley had fashioned a rude platform among the branches of the tree, and here he had slept, awakening refreshed but assailed by a thirst that was almost overpowering.