marked

drive one foot

drive one foot yet one more pace beyond the last. When he faltered, Koriel was there to catch his arm; when he fell, Koriel was always there to haul him up. Koriel never tired.
At last they stopped. They were standing in a gorge perhaps a quarter mile wide, below one of the lines of low, broken cliffs that flanked it on either side. He collapsed on the nearest boulder. Koriel stood a few paces ahead surveying the landscape. The line of crags immediately above them was interrupted by a notch, which marked the point where a steep and narrow cleft tumbled down to break into the wall of the main gorge. From the bottom of the cleft, a mound of accumulated rubble and rock debris led down about fifty feet to blend with the floor of the gorge not far from where they stood. Koriel stretched out an arm to point up beyond the cleft.
"Gorda will be roughly that way," he said without turning. "Our best way would be up and onto that ridge. If we stay on the flat and go around the long way, it'll be too far. What d'you say?"
The other stared up in mute despair. The rockfall, funneling up toward the mouth of the cleft, looked like a mountain. In the distance beyond towered the ridge, jagged and white in the glare of the sun. It was impossible.
Koriel