So when this storm turned ugly, and the light in the canyon was like the color of a branch, Nirgal said, “We’d better get up there,” and they all piled into the trucks and drove to the nearest elevator that ran up inside the canyon wall to the rim. Up on top the people who knew how took over the snowplows and drove them by hand, with the great blowers now spraying steam over the drifts to wash them off the tenting. Everyone else teamed up and took hand-pulled steam carts out, and worked on moving the piles of sludge brought down by the snowplows away from the foundation. This was what Nirgal helped with, running around with a steam hose like he was playing some strenuous new sport. No one could keep up his pace, but quickly they were all thigh-deep in cold swirling mud, with winds over 150, and solid low black clouds spitting more mud down on them all the time. The winds surged to 180 kilometers an hour, but no one minded; it helped clear the tent of the mud. They made sweep after sweep, moving east with the wind, pushing rivers of mud over the drop into uncovered Uzboi Vallis.

When the storm ended, the tenting was fairly clear, but the land on both sides of Nirgal Vallis was deep in frozen mud, and the crews were soaked. They piled back into elevators and dropped to the canyon floor, exhausted and cold, and when they got out at the bottom they looked at each other, entirely black figures except for their faceplates. Nirgal pulled off his helmet and there he was, laughing hard, irrepressible, and when he scooped mud off his helmet and threw it at them, the fight was on. Most found it prudent to keep their helmets on, and it was a strange sight there on the dark floor of that canyon, blind muddy figures throwing clumps of mud at each other and running out into the stream, slipping-around as they wrestled and dove.

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