The dogs continued their pursuit, slow and methodical. Pitt had hoped the trackers would follow Zhou’s trail, but they still tracked his scent. Pitt could tell by the sporadic barking that they were perhaps just a few hundred yards behind. He stopped and listened every few minutes, trying to gauge their position.

As the jungle enveloped him, he lost any reference for finding direction. The sound of the dogs became his only clue. Fearful of accidentally backtracking into the teeth of the searchers, he kept a careful ear out for their barking.

The jungle came alive at night with a concert of strange hoots, calls, and cries. Pitt kept his sharp stick in one hand in case the cries came not from a bird or frog but from a jaguar or caiman.

The noises helped take Pitt’s mind off his fatigue. Without Zhou’s water and protein bar, he might have collapsed, but the minimal nourishment kept him going. Fatigue oozed from his bones, making every step painful. Being unused to the hot, steamy environment only added to his lethargy. Tempted to stop and lie down, he thought of Giordino and the other prisoners, and his feet kept moving.

Though his clothes had dried after his earlier swim, now they were soaked from endless sweat. He prayed for rain, knowing it would help him elude the trackers. But the normally reliable Panamanian skies failed to cooperate, offering nothing more than an occasional drizzle.

He slipped on a patch of mud, then pulled himself onto a tree stump and rested. The darkness also seemed to have slowed the trackers. A distant barking told him he still held a comfortable lead, but he soon spied a faint glow through the foliage from the searcher’s lights.

Pitt dragged himself to his feet and pressed on into the gauntlet of unseen branches. Hour by hour, the night wore on in a cycle of plodding, tripping, and stumbling through the jungle. Always, the din of dogs overshadowed the jungle’s other sounds.

Moving like a zombie, Pitt staggered through a grove of bamboo—then took a step and felt only air. He collapsed over the lip of a narrow ravine, tumbling headfirst down a grassy hill and into a small stream. He sat there for several minutes, the cool water washing away the pain of his bruises and lacerations. Overhead, a seam of twinkling stars provided a faint but welcome light.

The water would give him the chance to escape the pursuing dogs. After refilling Zhou’s canteen, he shuffled down the center of the creek. The water seldom came past his knees, but it was deep enough to mask his tracks. With the starlight, he found the going easier, even as he slipped and fell in the streambed. He followed it for what felt like miles but was in fact only a few hundred yards.