This lap of the journey was nearly the hardest. But the low roar of the river steadily grew louder as they stumbled on, the luminous mist lapping their ankles, their knees, their waists. It closed above their heads, so that they moved in a ghostlike, shadowless world in which the very air seemed dimly lighted.

Trees were visible. Garth, almost spent, searched for a shelving beach, found it, and dropped in a limp heap. He saw Paula sink down beside him. The men threw off their heavy packs with relief.

Brown—the man was made of rawhide and steel!—said, "I'll need help to make a raft. The boys that feel tired can keep their eyes open for pursuit planes. I don't think the Commander would send out truck-cats at night, but he'll use searching planes."

"They can't see us in this fog," Paula said faintly.

"They could hear us, with their motors muffled. So we'll work fast. Garth!"

"Yeah. What?"

"What trees do we want?"

Garth pointed. "Lata. Like that one, over there. They're easy to cut down, and they float. You'll find tough vines all around here." He forced the words out with an effort. Brown mustered eight of his men, including the red-haired Sampson, and led them away. The sound of ringing axes presently drifted back.

Two others had been stationed on hillocks, above the low-lying fog, to watch for planes. Garth, alone with Paula, was almost too tired to be conscious of her presence. He heard her voice.

"Cigaret?"