As his eyes adjusted, he could easily make out the river, a tributary of the Potomac and the centerpiece for what was to be a rejuvenation of this part of the city. Just a mile or so to the south, East Capitol Street crossed the river, its westbound lanes headed into Capitol Hill, the Mall, and, of course, the White House.

Just a mile.

Gabe managed a thin smile at the irony. A meeting was about to take place in these hardscrabble surroundings that could affect the world as much as any that had been held in those staid and hoary buildings. It wouldn't be long now.

For a time, the attack on Blackthorn nagged at him. How could the killer have known where Blackthorn was staying? At the psychologist's urging, Gabe had asked Treat Griswold to have his condo checked over for listening devices. Reportedly, none had been found.

Two minutes.

The field remained deserted. There was no movement that Gabe could discern anywhere underneath the bridge. He wondered what he would do if Ferendelli failed to show. Perhaps he would pay a visit to Lily Sexton and offer to set her broken shoulder without anesthesia should she hold out on him anymore.

It seemed as if Ferendelli had carefully chosen the photograph in the medical office to ensure that Gabe would know with certainty that the meeting was with him. Still, Gabe was regrettably learning not to trust anything or anybody when it came to the president.

Careful to keep the interior light from going on and wondering if he had been unwise not to bring along a blunt weapon of some sort, Gabe locked the Buick, left it, and headed across the field toward the blackness beneath the bridge. Overhead, the whoosh of passing cars grew louder as he approached. Headlights flashed by. From his left, the scent of the river grew stronger.

As he neared the bridge, he suddenly found himself picturing the desert, and Condor at a full gallop, bearing him effortlessly across the parched ground, toward a burnt orange setting sun.

Soon, he thought. Soon it will be over.

The field itself seemed to be in excellent shape and reasonably free of debris, but the underside of the Benning Street Bridge smelled of stale beer, river muck, and urine. Broken glass crunched beneath his boots. Gabe stepped into the dense shadow just under the edge of the bridge. Then he turned toward the field and waited for the man he had succeeded in the White House-the Renaissance man who many felt was dead.

"I have a gun," a soft, cultured voice said from behind him. "Lift your hands where I can see them. Don't turn around. What's your name?"

"Singleton. Dr. Gabe Singleton."

"How do you get up to the residence from the office?"

"The elevator across the hall."

"Could you have been followed?"

"I didn't see anyone, but I didn't take any special evasive precautions, either."

"You should have."

"I'm sorry."

"Walk over there to that support. Keep your hands up."

Gabe did as he was ordered.

"Turn around slowly with your hands up."

Again, Gabe did as he was asked. The gaunt, unshaven man confronting him carried no gun. Instead, he extended his bony hand and gripped Gabe's with surprising force. His hair was unkempt, and at that moment he looked considerably older than fifty-six-the age Gabe had read in his personnel file. What Gabe could discern of his expression was grim. He was jittery and badly in need of a shower. His tension was nearly palpable.

"I can't tell you how relieved I am to find that you are alive, Dr. Ferendelli," he said.

"We are in a crisis of immense proportions, Dr. Singleton. Our president is under attack. His life is in danger every day."

"Then his psychiatric breaks are-"

"If by psychiatric you mean a disease of some sort-a spontaneous malfunction in his brain-his problems are not psychiatric at all."

"But-"

Even through the gloom, Gabe could see the intensity glowing in Ferendelli's eyes.

"President Stoddard is not insane," Ferendelli said. "He's being poisoned, dosed with a psychoactive drug-no, no, make that a number of psychoactive drugs."

"I wondered about that when I witnessed one of his episodes," Gabe said, "so I drew some blood for analysis. But the tubes were stolen from the refrigerator in our office."

"Stolen? Do you know by whom?"

"No. Do you?"

"I have some ideas."

"Dr. Ferendelli-Jim-are you all right right now? I mean are you ill?"

"I have not slept for more than two hours at a time in weeks. I'm in as much danger as the president is. They could kill me just as they could kill him, with… with the push of a button." Ferendelli looked furtively about. "Are you sure you weren't followed?"

Something about the question was bothersome to Gabe, but he could not discern precisely what.

"No, I'm not sure that I wasn't followed," he said. "I told you that. Listen, I have a car right over there. Let me take you to a hospital or… or to my place."

"Just talk to me," Ferendelli said. "Talk to me and listen to me. They've poisoned me, Doctor. Just like the president, they've poisoned me. I haven't come in because I don't know precisely who they are, and I haven't run because I owe it to my president and the country not to."

"Is your daughter all right?"

"Yes. She's fine as far as I know. When all of this began to happen, I feared they might use her to get at me, so I had her go away to stay with friends. So long as she stays where she is, no one will find her. Now please, listen to me."

"I'll listen, Dr. Ferendelli, but try to stay focused. Who're they? Is one of them Lily Sexton?"

Mention of the woman's name hit Ferendelli like a sucker punch. For some time he said nothing. When he finally did speak, there was a noticeable tremor in his voice.

"I pray, sir, that you have had no contact with that woman."

"I'll tell you of my connection with her when you finish. Please, Jim, please. From the beginning?"

"Oh, this is bad," Ferendelli said. "Very bad. You've seen her, haven't you-been with her?"

"I have. But please, compose yourself and tell me what's been going on."

Inventor, physician, artist, intellectual. The Renaissance man Gabe had heard so much about was a nervous shell.

As if reading Gabe's thoughts, Ferendelli took a calming breath.

"I have a friend named Wysocki," he said, "Zeke Wysocki. He's an analytical chemist and owns a small lab just outside of Durham. He's a loner, with not one whit of social skills, but he is a wizard of a chemist, and a hell of a poker player. That's how we met-playing poker at a small, private game. He liked to talk about some of the contract work cases he did for the police and the FBI-cases that no regular labs could handle. So, on a lark, when the analysis of the president's blood came back negative, I sent one of the split samples I had kept to Wysocki."

"He found something."

"A number of things, actually. I drew bloods after two of the president's attacks. There were traces of several different hallucinogens in each sample, only not the same ones."

"Go on, Jim. You're doing great."

Ferendelli was again becoming jittery. He pulled a small bottle of spring water from his jacket pocket and managed a shaky, prolonged swallow. Gabe wondered if the bottle might contain vodka but didn't ask. Ferendelli wasn't intoxicated, just frightened-frightened and totally spent.

"You sure you weren't followed? I've been getting bad vibes about this place since you arrived."

Gabe glanced out at the empty field.

"I don't see how, but if you want to go someplace else, or maybe just drive and talk, we can do that."

"I… I guess we can stay here."

"Go on, Jim. Tell me what your friend found. This is all beginning to come together for me. We're going to get to the bottom of things. I promise you we are. And whatever you and the president need to be okay, we're going to get it for you. I've got a friend in the Secret Service we can trust."