It was immediately clear that they could not walk into the wind. They had to crawl on hands and knees, the middle person with Sax draped over his or her back, the other two supporting on each side. They crawled on, following the thread; without it they wouldn’t have had a hope of relocating the rover. With it they could crawl on, straight toward their goal, their hands and knees going numb with the cold. Michel stared down at a black flow of dust and sand under his faceplate. At some point he realized that the faceplate was badly scarred.

They stopped to rest when shifting Sax to the next carrier. When his turn was done Michel knelt, panting and resting his faceplate right on the ground, so that the dust flew over him. He could taste red grit on his tongue, bitter and salty and sulphuric— the taste of Martian fear, of Martian death— or just of his own blood; he couldn’t say. It was too loud to think, his neck hurt, there was a ringing in his ears, and red worms in his eyes, the little red people finally coming out of his peripheral vision to dance right in front of him. He felt he was on the verge of blacking out. Once he thought he was going to vomit, which was dangerous in a helmet, and his whole body clenched in the effort to hold it down, a sweaty gross pain in every muscle, every cell of him. After a long struggle the urge passed.

They crawled on. An hour of violent and wordless exertion passed, and then another. Michel’s knees were losing their numbness to sharp stabbing pains, going raw. Sometimes they just lay on the ground, waiting for a particularly maniacal gust to pass. It was striking how even at hurricane speeds the wind came in individual buffets; the wind was not a steady pressure, but a series of shocking blows. They had to lie prone for so long waiting out these hammerstrokes that there was time to get bored, to have one’s mind wander, to doze. It seemed they might be caught out by dawn. But then he saw the shattered numerals of his faceplate clock— it was actually only 3:30 A.M. They crawled on.

• • •

And then the thread lifted, and they nosed right into the lock door of the rover, where the Ariadne thread was tied. They cut it free and blindly hauled Sax into the lock, then climbed in wearily after him. They got the outer door closed, and pumped the chamber. The floor of the lock was deep in sand, and fines swirled away from the pump ventilator, staining the overbright air. Blinking, Michel stared into the small faceplate of Sax’s emergency headpiece; it was like looking into a diving mask, and he saw no sign of life.