They had found a deposit of it in an almost inaccessible region of cliffs and canyons. “Not even the woods goats can get in there,” Stevens, the leader of that party, said. “If the salt was in an accessible place there would have been a salt lick there and goats in plenty.”

“If woods goats care for salt the way Earth animals do,” Lake said. “When fall comes we’ll make a salt lick and find out.”

Two more weeks went by and Craig and Schroeder returned with their surviving hunters. They had followed the game to the eastern end of the snow-capped mountain range but there the migration had drawn away from them, traveling farther each day than they could travel. They had almost waited too long before turning back: the grass at the southern end of the plateau was turning brown and the streams were dry. They got enough water, barely, by digging seep holes in the dry stream beds.