The Monster, at the first motion, lunged forward with a terrible scream. It covered one hundred yards in six seconds. The rifles jerked up and blazed fire. A windstorm from the beast’s mouth engulfed them in the stench of slime and old blood. The Monster roared, teeth glittering with sun.

The rifles cracked again. Their sound was lost in shriek and lizard thunder. The great level of the reptile’s tail swung up, lashed sideways. Trees exploded in clouds of leaf and branch. The Monster twitched its jeweler’s hands down to fondle at the men, to twist them in half, to crush them like berries, to cram them into its teeth and its screaming throat. Its boulderstone eyes leveled with the men. They saw themselves mirrored. They fired at the metallic eyelids and the blazing black iris. Like a stone idol, like a mountain avalanche, Tyrannosaurus fell.

Thundering, it clutched trees, pulled them with it. It wrenched and tore the metal Path. The men flung themselves back and away. The body hit, ten tons of cold flesh and stone. The guns fired. The Monster lashed its armored tail, twitched its snake jaws, and lay still. A fount of blood spurted from its throat. Somewhere inside, a sac of fluids burst. Sickening gushes drenched the hunters. They stood, red and glistening.

The thunder faded.

The jungle was silent. After the avalanche, a green peace. After the nightmare, morning.

Billings and Kramer sat on the pathway and threw up. Travis and Lesperance stood with smoking rifles, cursing steadily. In the Time Machine, on his face, Eckels lay shivering. He had found his way back to the Path, climbed into the Machine.

Travis came walking, glanced at Eckels, took cotton gauze from a metal box, and returned to the others, who were sitting on the Path.

“Clean up.”

They wiped the blood from their helmets. They began to curse too. The Monster lay, a hill of solid flesh. Within, you could hear the sighs and murmurs as the furthest chambers of it died, the organs malfunctioning, liquids running a final instant from pocket to sac to spleen, everything shutting off, closing up forever. It was like standing by a wrecked locomotive or a steam shovel at quitting time, all valves being released or levered tight. Bones cracked; the tonnage of its own flesh, off balance, dead weight, snapped the delicate forearms, caught underneath. The meat settled, quivering.

Another cracking sound. Overhead, a gigantic tree branch broke from its heavy mooring, fell. It crashed upon the dead beast with finality.

“There.” Lesperance checked his watch. “Right on time. That’s the giant tree that was scheduled to fall and kill this animal originally.” He glanced at the two hunters. “You want the trophy picture?”

“What?”

“We can’t take a trophy back to the Future. The body has to stay right here where it would have died originally, so the insects, birds, and bacteria can get at it, as they were intended to. Everything in balance. The body stays. But we can take a picture of you standing near it.”

The two men tried to think, but gave up, shaking their heads.

They let themselves be led along the metal Path. They sank wearily into the Machine cushions. They gazed back at the ruined Monster, the stagnating mound, where already strange reptilian birds and golden insects were busy at the steaming armor. A sound on the floor of the Time Machine stiffened them. Eckels sat there, shivering.

“I’m sorry,” he said at last.

“Get up!” cried Travis.

Eckels got up.

“Go out on that Path alone,” said Travis. He had his rifle pointed, “You’re not coming back in the Machine. We’re leaving you here!”

Lesperance seized Travis’s arm. “Wait-”

“Stay out of this!” Travis shook his hand away. “This fool nearly killed us. But it isn’t that so much, no. It’s his shoes! Look at them! He ran off the Path. That ruins us! We’ll forfeit! Thousands of dollars of insurance! We guarantee no one leaves the Path. He left it. Oh, the fool! I’ll have to report to the government. They might revoke our license to travel. Who knows what he’s done to Time, to History!”

“Take it easy, all he did was kick up some dirt.”

“How do we know?” cried Travis. “We don’t know anything! It’s all a mystery! Get out of here, Eckels!”

Eckels fumbled his shirt. “I’ll pay anything. A hundred thousand dollars!”

Travis glared at Eckels’ checkbook and spat. “Go out there. The Monster’s next to the Path. Stick your arms up to your elbows in his mouth. Then you can come back with us.”

“That’s unreasonable!”

“The Monster’s dead, you idiot. The bullets! The bullets can’t be left behind. They don’t belong in the Past; they might change anything. Here’s my knife. Dig them out!”

The jungle was alive again, full of the old tremorings and bird cries. Eckels turned slowly to regard the primeval garbage dump, that hill of nightmares and terror. After a long time, like a sleepwalker he shuffled out along the Path.