By now, Yeager took for granted their turreted eyes that, chameleonlike, moved independently of each other, the green-brown scales they used for skin, their clawed hands and feet, their wide mouths full of little pointed teeth. Even the bifurcated tongues they sometimes used to lick their hard, immobile lips were just part of them, although he’d needed quite a while to get used to those.

“We will be warm tonight?” Ristin asked. Though he spoke English, at the end of the sentence he tacked on the little cough the Lizards used: sort of an audible question mark.

“We will be warm tonight,” Sam answered in the Lizards’ language, punctuating his sentence with a different cough, the one that put emphasis on his words.

He had reason for his confidence. The Lizards’ bombers hadn’t hit North Dakota badly: not much up here needed hitting, Yeager thought. The flat farming country reminded him of the flat farming country in eastern Nebraska where he’d grown up. New Salem could easily have been one of the little towns between Lincoln and Omaha.

The wagon had stopped not far from a snow-covered boulder with an unnaturally flat top. Barbara brushed off the snow with her sleeve. “Oh, it has a plaque on it,” she said, and brushed away more snow so she could read the words on the bronze. She started to laugh.

“What’s so funny?” Yeager asked. He absentmindedly tacked the interrogative cough onto that question, too.

“This is the Wrong Side Up Monument,” she answered. “That’s what the plaque says, anyhow. Seems one of the early farmers had just started breaking the ground so he could plant for the first time when an Indian came along, looked at a chunk of sod, set it back the right way, and said, ‘Wrong side up.’ The farmer thought about it, decided he was right, and went into dairying instead. This is part of a big dairy area now.”