Johnston just nodded patiently, and smiled.

Chris was a graduate student in the history of science - a bitterly controversial field - but he neatly sidestepped the disputes by focusing not on modern science, but on medieval science and technology. Thus he was becoming expert in techniques of metallurgy, the manufacture of armor, three-field crop rotation, the chemistry of tanning, and a dozen other subjects from the period. He had decided to do his doctoral dissertation on the technology of medieval mills - a fascinating, much-neglected area.

And his particular interest was, of course, the mill of Sainte-Mere.

Johnston waited calmly.

Chris had been an undergraduate, in his junior year, when his parents were killed in an automobile accident. Chris, an only child, was devastated; he thought he would drop out of school. Johnston moved the young student into his house for three months, and served as a substitute father for many years afterward, advising him on everything from settling his parents' estate to problems with his girlfriends. And there had been a lot of problems with girlfriends.

In the aftermath of his parents' death, Chris had gotten involved with many women. The subsequent complexity of his life - dirty looks in a seminar from a jilted lover; frantic midnight calls to his room because of a missed period, while he was in bed with someone else; clandestine hotel-room meetings with an associate professor of philosophy who was in the midst of a nasty divorce - all this became a familiar texture to his life. Inevitably his grades suffered, and then Johnston took him aside, spending several evenings talking things through with him.

But Chris wasn't inclined to listen; soon after, he was named in the divorce. Only the Professor's personal intervention prevented him from being expelled from Yale. Chris's response to this sudden jeopardy was to bury himself in his studies; his grades swiftly improved; he eventually graduated fifth in his class. But in the process he became conservative. Now, at twenty-four, he tended toward fussiness, and stomach trouble. He was reckless only with women.

"Finally," Chris said. "It's coming up."

The liquid crystal display showed an outline in bright green. Through the transparent display, they could see the ruins of the mill, with the green outline superimposed. This was the latest method for modeling archaeological structures. Formerly, they had relied on ordinary architectural models, made of white foamcore, cut and assembled by hand. But the technique was slow, and modifications were difficult.

These days, all models were made in the computer. The models could be quickly assembled, and easily revised. In addition, they allowed this method for looking at models in the field. The computer was fed mapped coordinates from the ruin; using the GPS-fixed tripod position, the image that came up on the screen was in exact perspective.

They watched the green outline fill in, making solid forms. It showed a substantial covered bridge, built of stone, with three water wheels beneath it. "Chris," Johnston said, "you've made it fortified." He sounded pleased.

"I know it's a risk… ," he said.

"No, no," the Professor said, "I think it makes sense."

There were references in the literature to fortified mills, and certainly there were records of innumerable battles over mills and mill rights. But few fortified mills were actually known: one in Buerge and another recently discovered near Montauban, in the next valley. Most medieval historians believed such fortified mill buildings were rare.

"The column bases at the water's edge are very large," Chris said. "Like everything else around here, once the mill was abandoned, the local people used it as a quarry. They took away the stones to build their own houses. But the rocks in the column bases were left behind, because they were simply too large to move. To me, that implies a massive bridge. Probably fortified."

"You may be right," Johnston said. "And I think-"

The radio clipped to his waist crackled. "Chris? Is the Professor with you? The minister is on-site."

Johnston looked across the monastery excavation, toward the dirt road that ran along the edge of the river. A green Land Rover with white lettering on the side panels was racing toward them, raising a large plume of dust. "Yes indeed," he said. "That will be Francois. Always in a rush."

"Edouard! Edouard!" Francois Bellin grabbed the Professor by the shoulders, and kissed him on both cheeks. Bellin was a large, balding, exuberant man. He spoke rapid French. "My dear friend, it is always too long. You are well?"

"I am, Francois," Johnston said, taking a step back from this effusiveness. Whenever Bellin was excessively friendly, it meant there was a problem ahead. "And you, Francois?" Johnston said. "How does it go?"

"The same, the same. But at my age, that suffices." He looked around the site, then placed his hand on Johnston's shoulder in a conspiratorial way. "Edouard, I must ask you a favor. I have a small difficulty."

"Oh?"

"You know this reporter, from L'Express-"

"No," Johnston said. "Absolutely not."

"But Edouard-"

"I already talked to her on the phone. She's one of those conspiracy people. Capitalism is bad, all corporations are evil-"

"Yes, yes, Edouard, what you say is true." He leaned closer. "But she sleeps with the minister of culture."

"That doesn't narrow the field much," Johnston said.

"Edouard, please. People are starting to listen to her. She can cause trouble. For me. For you. For this project."

Johnston sighed.

"You know there is a sentiment here that Americans destroy all culture, having none of their own. There is trouble with movies and music. And there has been discussion of banning Americans from working on French cultural sites. Hmm?"

Johnston said, "This is old news."

"And your own sponsor, ITC, has asked you to speak to her."

"They have?"

"Yes. A Ms. Kramer requested you speak to her."

Johnston sighed again.

"It will only take a few minutes of your time, I promise you," Bellin said, waving to the Land Rover. "She is in the car."

Johnston said, "You brought her personally?"

"Edouard, I am trying to tell you," Bellin said. "It is necessary to take this woman seriously. Her name is Louise Delvert."

As she climbed out of the car, Chris saw a woman in her mid-forties, slender and dark, her face handsome, with strong features. She was stylish in the way of certain mature European women, conveying a sophisticated, understated sexuality. She appeared dressed for an expedition, in khaki shirt and pants, straps around her neck for camera, video and tape recorder. She carried her notepad in her hand as she strode toward them, all business.

But as she came closer, she slowed down.

Delvert extended her hand. "Professor Johnston," she said, in unaccented English. Her smile was genuine and warm. "I cannot tell you how much I appreciate your taking the time to see me."

"Not at all," Johnston said, taking her hand in his. "You have come a long way, Miss Delvert. I am pleased to help you in any way I can."

Johnston continued to hold her hand. She continued to smile at him. This went on for ten seconds more, while she said that he was too kind and he said on the contrary, it was the very least he could do for her.

They walked through the monastery excavations, a tight little group: the Professor and Miss Delvert in the front, Bellin and Chris following behind, not too close, but still trying to hear the discussion. Bellin wore a quiet, satisfied smile; it occurred to Chris that there was more than one way to deal with a troublesome culture minister.

As for the Professor, his wife had been dead for many years, and although there were rumors, Chris had never seen him with another woman. He was fascinated to watch him now. Johnston did not change his manner; he simply gave the reporter his undivided attention. He conveyed the impression that there was nothing in the world more important than she was. And Chris had a feeling that Delvert's questions were much less contentious than she had planned.