A typical episode of private warfare occurred in 1357. Sir Oliver de Vannes, an English knight of nobility and character, had taken over the towns of Castelgard and La Roque, along the Dordogne River. By all accounts, this "borrowed lord" ruled with honest dignity, and was beloved by the people. In April, Sir Oliver's lands were invaded by a rampaging company of two thousand brigandes, renegade knights under the command of Arnaut de Cervole, a defrocked monk known as "the Archpriest." After burning Castelgard to the ground, Cervole razed the nearby Monastery of Sainte-Mère, murdering monks and destroying the famed water mill on the Dordogne. Cervole then pursued Sir Oliver to the fortress of La Roque, where a terrible battle followed.

Oliver defended his castle with skill and daring. Contemporary accounts credit Oliver's efforts to his military adviser, Edwardus de Johnes. Little is known of this man, around whom a Merlin-like mythology grew up: it was said he could vanish in a flash of light. The chronicler Audreim says Johnes came from Oxford, but other accounts say he was Milanese. Since he traveled with a team of young assistants, he was most likely an itinerant expert, hiring himself out to whoever paid for his services. He was schooled in the use of gunpowder and artillery, a technology new at that time…

Ultimately, Oliver lost his impregnable castle when a spy opened an inside passage, allowing the Archpriest's soldiers to enter. Such betrayals were typical of the complex intrigues of that time.

From The Hundred Years War in France by M. D. Backes, 1996

"Anyone who is not shocked by quantum theory does not understand it."

"Nobody understands quantum theory."

He should never have taken that shortcut.

Dan Baker winced as his new Mercedes S500 sedan bounced down the dirt road, heading deeper into the Navajo reservation in northern Arizona. Around them, the landscape was increasingly desolate: distant red mesas to the east, flat desert stretching away in the west. They had passed a village half an hour earlier - dusty houses, a church and a small school, huddled against a cliff - but since then, they'd seen nothing at all, not even a fence. Just empty red desert. They hadn't seen another car for an hour. Now it was noon, the sun glaring down at them. Baker, a forty-year-old building contractor in Phoenix, was beginning to feel uneasy. Especially since his wife, an architect, was one of those artistic people who wasn't practical about things like gas and water. His tank was half-empty. And the car was starting to run hot.

"Liz," he said, "are you sure this is the way?"

Sitting beside him, his wife was bent over the map, tracing the route with her finger. "It has to be," she said. "The guidebook said four miles beyond the Corazón Canyon turnoff."

"But we passed Corazón Canyon twenty minutes ago. We must have missed it."

"How could we miss a trading post?" she said.

"I don't know." Baker stared at the road ahead. "But there's nothing out here. Are you sure you want to do this? I mean, we can get great Navajo rugs in Sedona. They sell all kinds of rugs in Sedona."

"Sedona," she sniffed, "is not authentic."

"Of course it's authentic, honey. A rug is a rug."

"Weaving."

"Okay." He sighed. "A weaving."

"And no, it's not the same," she said. "Those Sedona stores carry tourist junk - they're acrylic, not wool. I want the weavings that they sell on the reservation. And supposedly the trading post has an old Sandpainting weaving from the twenties, by Hosteen Klah. And I want it."

"Okay, Liz." Personally, Baker didn't see why they needed another Navajo rug - weaving - anyway. They already had two dozen. She had them all over the house. And packed away in closets, too.

They drove on in silence. The road ahead shimmered in the heat, so it looked like a silver lake. And there were mirages, houses or people rising up on the road, but always when you came closer, there was nothing there.

Dan Baker sighed again. "We must've passed it."

"Let's give it a few more miles," his wife said.

"How many more?"

"I don't know. A few more."

"How many, Liz? Let's decide how far we'll go with this thing."

"Ten more minutes," she said.

"Okay," he said, "ten minutes."

He was looking at his gas gauge when Liz threw her hand to her mouth and said, "Dan!" Baker turned back to the road just in time to see a shape flash by - a man, in brown, at the side of the road - and hear a loud thump from the side of the car.

"Oh my God!" she said. "We hit him!"

"What?"

"We hit that guy."

"No, we didn't. We hit a pothole."

In the rearview mirror, Baker could see the man still standing at the side of the road. A figure in brown, rapidly disappearing in the dust cloud behind the car as they drove away.

"We couldn't have hit him," Baker said. "He's still standing."

"Dan. We hit him. I saw it."

"I don't think so, honey."

Baker looked again in the rearview mirror. But now he saw nothing except the cloud of dust behind the car.

"We better go back," she said.

"Why?"

Baker was pretty sure that his wife was wrong and that they hadn't hit the man on the road. But if they had hit him, and if he was even slightly injured - just a head cut, a scratch - then it was going to mean a very long delay in their trip. They'd never get to Phoenix by nightfall. Anybody out here was undoubtedly a Navajo; they'd have to take him to a hospital, or at least to the nearest big town, which was Gallup, and that was out of their way-

"I thought you wanted to go back," she said.

"I do."

"Then let's go back."

"I just don't want any problems, Liz."

"Dan. I don't believe this."

He sighed, and slowed the car. "Okay, I'm turning. I'm turning."

And he turned around, being careful not to get stuck in the red sand at the side of the road, and headed back the way they had come.

"Oh Jesus."

Baker pulled over, and jumped out into the dust cloud of his own car. He gasped as he felt the blast of heat on his face and body. It must be 120 degrees out here, he thought.

As the dust cleared, he saw the man lying at the side of the road, trying to raise himself up on his elbow. The guy was shaky, about seventy, balding and bearded. His skin was pale; he didn't look Navajo. His brown clothes were fashioned into long robes. Maybe he's a priest, Baker thought.

"Are you all right?" Baker said as he helped the man to sit up on the dirt road.

The old man coughed. "Yeah. I'm all right."

"Do you want to stand up?" he said. He was relieved not to see any blood.

"In a minute."

Baker looked around. "Where's your car?" he said.

The man coughed again. Head hanging limply, he stared at the dirt road.

"Dan, I think he's hurt," his wife said.

"Yeah," Baker said. The old guy certainly seemed to be confused. Baker looked around again: there was nothing but flat desert in all directions, stretching away into shimmering haze.

No car. Nothing.

"How'd he get out here?" Baker said.

"Come on," Liz said, "we have to take him to a hospital."

Baker put his hands under the man's armpits and helped the old guy to his feet. The man's clothes were heavy, made of a material like felt, but he wasn't sweating in the heat. In fact, his body felt cool, almost cold.

The old guy leaned heavily on Baker as they crossed the road. Liz opened the back door. The old man said, "I can walk. I can talk."