They had been on the mountain one hundred and twelve days. In all that time they had seen not a single viral. For days after they had crossed the ridge, the snow had poured down, sealing them inside the lodge of the old hotel. A great stone building, its doors and windows covered by sheets of plywood, set into the frame with heavy screws. They had expected to find bodies inside but the place was empty, the furniture around the hearth of its cavernous front room draped in ghostly white sheets, the larder of its vast kitchen stocked with every kind of can, many still with their labels. Upstairs, a warren of bedrooms, and in the basement, a huge, silent furnace and long racks lining the walls, holding skis. The place was as cold as the grave. They didn’t know if the chimney was blocked; at the very least it would be full of leaves and birds’ nests. The only thing to do was light a fire and hope for the best. In the office, they found boxes of paper packed away in a closet; they rolled it up for kindling and, with Peter’s axe, chopped up a pair of dining room chairs. After a few smoky minutes, the room blazed with light and warmth. They dragged mattresses down from the second floor and slept by the fire, while the snow piled up outside.

They had found the Sno-Cats the following morning: three of them, resting on their treads in a garage behind the lodge. You think you can get one of these things running? Peter asked Michael.

It had taken most of the winter. By then, everyone was half stir-crazy, anxious to be leaving. The days were longer, and the sun seemed to hold a distant, remembered warmth; but still the snow was deep, rising in great drifts against the walls of the lodge. They had burned most of the furniture and the railings of the porch. From the three Sno-Cats, Michael had harvested enough parts to make one go, or so he believed; it was fuel that was the problem. The large tank behind the shed was empty, fissured with rot. All he had was what was in the Cats themselves, just a few gallons, badly contaminated by rust. He siphoned this off into plastic pails and poured it through a funnel lined with rags. He let it settle overnight, then repeated the process, each time stripping more debris away but also depleting his supply. By the time he was satisfied, he had just five gallons left, which he poured back into the Cat.

“No promises,” he warned everyone. He’d done his best to flush the fuel tank, running gallon after gallon of melted snow through it, but it wouldn’t take much to gum up a fuel line. “The damn thing could kick a hundred meters from here,” he said. Though he knew they wouldn’t take this warning seriously.