Lonesome Dove, Volume 2: Comanche Moon by Larry McMurtry

SCULL STOOD ON THE EDGE of the crater, astonished first by the crater itself and then by what he saw in it. From rim to rim the crater must be a mile across, he judged. Below him, at the bottom of it, were the hundred or more people whose tracks he had seen-men and women, young and old. There were all waiting. The smoke rose from a pit in the center of the crater. Hector, whose head was missing, had been cooked standing up, in his skin.

The old man, Ahumado, had scarcely looked at Scull since his surrender. His eyelids drooped so low that it was hard to see his eyes. Men had shoveled away the bed of coals that had covered the pit for three days. The coals were scattered in heaps around the pit-many of them still glowed red.