'I think he planned to steal the components. Maybe he already has.'

`And do what with them?'

`I don't know. But it's going to happen today.'

Graves sat back. Drew put out his cigarette. Graves offered him another.

`What does a code like "binary" mean?'

`It could be just a random code,' Drew said. `But they usually have some specific meaning. That's why I thought it was atomic components.'

`Binary…'

`Meaning a twin system,' Drew said. `Something with two active parts, two units. Nuclear bombs are like that. You have two sections of uranium, neither of which will explode by itself. But you bring them together, and you reach critical mass, start a chain reaction.' He snapped his fingers. `Bingo.'

By now Graves was convinced that Drew believed this explanation. Graves did not. Whatever Wright planned, it had nothing to do with atomic bombs. That didn't fit with the tanks and hoses and nozzles, all of which pointed to some gas or liquid apparatus.

`He's insane,' Drew said suddenly. `That's the trouble. He's crazy. He's convinced that everybody is out to get him, and he's convinced that the government is being turned over to the wrong elements, and he's convinced that only he can set things right.'

`You mentioned that there was something else you, had to tap from the data banks. What was it?'

`That was strange,' Drew said. `I'd already tapped the Defence routings. My job was over. Then John asked me to tap into the State data banks.'

`State?'

`State Department. I said I couldn't. He told me to try, and gave me some more codes. I don't know where he got those either, but they worked.'

`What was the information he wanted?'

`File summary on one person,' Drew said. `A man who worked in State Department Intelligence named Graves.'

`I see,' Graves said. `Did you obtain the information?'

`Eventually.'

`And you gave it to Wright?'

`Yes. He wasn't interested in it, I don't think, except for one part. The psychological test scores.'

`Do you remember anything else?'

`No. Only that John was very interested in the psychological tests.' He puffed on the cigarette. `I remember he said when he saw it, "Well, this is the final cog in the machine", and laughed.'

`What did he mean by that?'

`Damned if I know,' Drew said.

As they left Drew's room, Lewis said, `By the way, they're still holding the girl.'

`The girl?' Graves was distracted, thinking about what Drew had said.

`The girl we picked up this morning.'

`Oh yes. Where is she?'

`They've got her downstairs. In the grand ballroom.'

Graves nodded and checked his watch. They'd held the girl for several hours already. `I'd better see her now,' he said. `What's her name?'

Lewis consulted his notes. `Cynthia Lembeck.'

`How does she seem?'

Lewis shrugged. `Nervous.'

Anyone would be nervous, Graves thought, who had to spend much time in the hotel's grand ballroom. It was a cavernous space with ornate walls and ceiling, but for some reason all the tables and chairs had been removed. The ballroom was empty except for a girl sitting in a fold-up chair near one wall, and a marshal standing nearby.

Graves went over to her.

Seen close, she was darkly tanned, conventionally pretty, and older than he had expected - in her late twenties or early thirties.

`Miss Lembeck?'

`Oh,' she said in surprise. `It's you.'

That stopped him. Stopped him cold. `You recognize me?'

`Well, just your face. I've seen your picture.'

`Where?'

`John's apartment.'

`I see.'

`Are you a friend of his?'

`Not exactly,' Graves said. `I work for the government.'

`Something to do with the Convention?'

`Not exactly.' He switched into a straightforward interrogation mode. `How long have you known Mr Wright, Miss Lembeck?'

`About a month.'

`How did you meet him?'

`Through friends.' She glanced from Graves to the marshal. `Have I done something wrong?'

`No, no. We just want to ask you some questions. What can you tell us about Mr Wright?'

`He's very nice,' she said. `We're engaged.'

`Oh?' That was a surprise.

`Yes. He bought me an apartment, just last week.'

`I see.'

`It's very nice. At least, it will be.'

The girl was not very bright, but she had a sweet sexiness that was unmistakable. Still, he couldn't imagine Wright marrying her. In the past he had married well-known women, celebrities.

`There's nothing there now,' the girl said. `They're moving furniture in today.'

`You must be excited.'

`Oh, I am. John's excited, too. But he has so much on his mind.'

`How do you mean?'

`Well, business things. He's very interested in politics, you know.'

`No, I didn't know that.'

`You didn't?' she seemed puzzled. `I thought - well, anyway, he is. And this morning, we had the news on the television, and they announced that the President was coming into town. Well, he got very upset, and started making telephone calls. A lot of them.'

`What sort of calls?'

`I don't know. They were long distance.'

`Did you hear any of them?'

`No.'

`Are you sure?s

'Well, I heard him ask the operator for area code 801. That's Washington, isn't it?'

`Yes,' Graves said. He knew that it wasn't, but he could check it later.

`He was very upset. And then later, he mentioned China. He doesn't like the President about China, you know.' She sighed. `He thinks it's very wrong.'

`I see. You say you've seen my picture -'

`Only last night,' she said. `That was the first time. I thought you were related to him or something. Because he has your picture up all over the place.'

`This happened last night?'

`Yes. But he was strange last night, anyway. Nervous.' `I see. What about?'

`I don't know. He's worried about business things. He said something about a shipment he's expecting.'

`What else was strange, last night?'

She hesitated, apparently embarrassed.

`Go on,' Graves said gently.

`Well, it was different last night. He was very. vigorous. He did it three times.'

`I see,' Graves said.

Outside the ballroom Lewis was in a phone booth, checking the area code. He came out and fell into step with Graves. `Eight oh one,' he said, `is Utah.'

`Any particular place?'

`No. The whole state is one area code.'

`Shit,' Graves said. `I wish we had a tap on his phone.' `Well, we did our best to get it,' Lewis reminded him. `Yeah,' Graves said. He sighed. `I never thought I'd hear myself complaining because we hadn't tapped a phone.'

`Things are different now,' Lewis said.

`They sure are.'

They went outside into the bright hot morning sun and climbed into the car. Lewis started the engine. `Where to?'

`Miss Lembeck's new apartment. The one Wright just rented.'

`Okay,' Lewis said.

When they arrived at the apartment building, they saw Wright's limousine parked in front. Behind the wheel George was reading a newspaper.

`Are we fully set up across the street?' Graves said.

`We should be,' Lewis said.

Graves nodded. `Wait here. I'll go see what they've found.'

The day before, they had set up a surveillance unit in the apartment building facing Wright's. Graves rode to the nineteenth floor, got out, and walked to Room 1905. He knocked once.

`Who is it?'

`Graves.'

The door was opened for him. He entered the room. It was small and bare except for equipment clustered around the windows. There were two sets of binoculars on tripods and three sets of cameras; four chairs; a directional microphone, also on a tripod; recording equipment; film canisters; heaped ashtrays. And a television set.