The patches of light disappeared, and the country opened out. The plane banked. Ross, with all the familiar landmarks of his world gone, could not have said if they were headed north or south. But moments later not even the thick curtain of snowflakes could blot out the pattern of red lights on the ground, and the helicopter settled down.

“Come on!”

For the second time Ross obeyed. He stood shivering, engulfed in a miniature blizzard. His clothing, protection enough in the city, did little good against the push of the wind. A hand gripped his upper arm, and he was drawn forward to a low building. A door banged and Ross and his companion came into a region of light and very welcome heat.

“Sit down—over there!”

Too bewildered to resent orders, Ross sat. There were other men in the room. One, wearing a queer suit of padded clothing, a bulbous helmet hooked over his arm, was reading a paper. The major crossed to speak to him and after they conferred for a moment, the major beckoned Ross with a crooked finger. Ross trailed the officer into an inner room lined with lockers.

From one of the lockers the major pulled a suit like the pilot’s, and began to measure it against Ross. “All right,” he snapped. “Climb into this! We haven’t all night.”

Ross climbed into the suit. As soon as he fastened the last zipper his companion jammed one of the domed helmets on his head. The pilot looked in the door. “We’d better scramble, Kelgarries, or we may be grounded for the duration.”