MANUEL took Mula and went to work. His sector was the Santa Magdalena, a scrap of bald-headed and desolate mountains, steep but not high, and so torrid in the afternoons that it was said that the old lava sometimes began to writhe and flow again from the sun's heat alone.

In the center valley there were five thousand acres of slag and vitrified rock from some forgotten old blast that had melted the hills and destroyed their mantle, reducing all to a terrible flatness. This was called Sodom. It was strewn with low-lying ghosts as of people and objects, formed when the granite bubbled like water.

Away from the dead center the ravines were body-deep in chaparral, and the hillsides stood gray-green with old cactus. The stunted trees were lower than the giant bushes and yucca.

Manuel went with Mula, a round easy man and a sparse gaunt mule. Mula was a mule, but there were other inhabitants of the Santa Magdalena of a genus less certain.

Yet even about Mula there was an oddity in her ancestry. Her paternal grandfather had been a goat. Manuel once told Mr. Marshal about this, but Mr. Marshal had not accepted it.

"She is a mule. Therefore, her father was a jack. Therefore his father was also a jack, a donkey. It could not be any other way."

Manuel often wondered about that, for he had raised the whole strain of animals, and he remembered who had been with whom.

"A donkey! A jack! Two feet tall and with a beard and horns. I always thought that he was a goat."

Manuel and Mula stopped at noon on Lost Soul Creek. There would be no travel in the hot afternoon. But Manuel had a job to do, and he did it. He took the forms from one of the packs that he had unslung from Mula, and counted out nine of them. He wrote down all the data on nine people. He knew all there was to know about them, their nativities and their antecedents. He knew that there were only nine regular people in the nine hundred square miles of the Santa Magdalena.

But he was systematic, so he checked the list over again and again. There seemed to be somebody missing. Oh, yes, himself. He got another form and filled out all the data on himself.