"What I haven't gotten across to anyone is just what this is. This is the most devious electronic weapon ever devised. It's armored like a battleship. It has to be; there's a lot of very slick programs out there that grab an invader and hang on like a terrier. If they ever got this far Kluge could deflect them. But usually they never even knew they'd been burgled. Kluge'd come in like a cruise missile, low and fast and twisty. And he'd route his attack through a dozen cut-offs.

"He had a lot of advantages. Big systems these days are heavily protected. People use passwords and very sophisticated codes. But Kluge helped invent most of them. You need a damn good lock to keep out a locksmith. He helped install a lot of the major systems. He left informants behind, hidden in the software. If the codes were changed, the computer itself would send the information to a safe system that Kluge could tap later. It's like you buy the biggest, meanest, best-trained watchdog you can. And that night, the guy who trained the dog comes in, pats him on the head, and robs you blind."

There was a lot more in that vein. I'm afraid that when Lisa began talking about computers, ninety percent of my head shut off.

"I'd like to know something, Osborne," Lisa said.

"What would that be?"

"What is my status here? Am I supposed to be solving your crime for you, or just trying to get this system back to where a competent user can deal with it?"

Osborne thought it over.

"What worries me," she added, "is that I'm poking around in a lot of restricted data banks. I'm worried about somebody knocking on the door and handcuffing me. You ought to be worried, too.

Some of these agencies wouldn't like a homicide cop looking into their affairs."

Osborne bridled at that. Maybe that's what she intended.

"What do I have to do?" he snarled. "Beg you to stay?"

"No. I just want your authorization. You don't have to put it in writing. Just say you're behind me."

"Look. As far as L.A. County and the State of California are concerned, this house doesn't exist.

There is no lot here. It doesn't appear in the tax assessor's records. This place is in a legal limbo. If anybody can authorize you to use this stuff, it's me, because I believe a murder was committed in it.

So you just keep doing what you've been doing."

"That's not much of a commitment," she mused.

"It's all you're going to get. Now, what else have you got?"

She turned to her keyboard and typed for a while. Pretty soon a printer started, and Lisa leaned back.

I glanced at her screen. It said: osculate posterior-p. I remembered that osculate meant kiss. Well, these people have their own language. Lisa looked up at me and grinned.

"Not you," she said, quietly. "Him."

I hadn't the faintest notion of what she was talking about.

Osborne got his printout and was ready to leave. Again, he couldn't resist turning at the door for final orders.

"If you find anything to indicate he didn't commit suicide, let me know."

"Okay. He didn't commit suicide."

Osborne didn't understand for a moment.

"I want proof."

"Well, I have it, but you probably can't use it. He didn't write that ridiculous suicide note."

"How do you know that?"

"I knew my first day here. I had the computer list the program. Then I compared it to Kluge's style.

No way he could have written it. It's tighter'n a bug's ass. Not a spare line in it. Kluge didn't pick his alias for nothing. You know what it means?"

"Clever," I said.

"Literally. But it means... a Rube Goldberg device. Something overly complex. Something that works, but for the wrong reason. You 'kluge around' bugs in a program. It's the hacker's Vaseline."

"So?" Osborne wanted to know.

"So Kluge's programs were really crocked. They were full of bells and whistles he never bothered to clean out. He was a genius, and his programs worked, but you wonder why they did. Routines so bletcherous they'd make your skin crawl. Real crafty bagbiters. But good programming's so rare, even his diddles were better than most people's super-moby hacks."

I suspect Osborne understood about as much of that as I did.

"So you base your opinion on his programming style."

"Yeah. Unfortunately, it's gonna be ten years or so before that's admissible in court, like graphology or fingerprints."

We eventually got rid of him, and I went home to fix the dinner. Lisa joined me when it was ready.

Once more she had a huge appetite.

I fixed lemonade and we sat on my small patio and watched evening gather around us.

I woke up in the middle of the night, sweating. I sat up, thinking it out, and I didn't like my conclusions. So I put on my robe and slippers and went over to Kluge's.

The front door was open again. I knocked anyway. Lisa stuck her head around the corner.

"Victor? Is something wrong?"

"I'm not sure," I said. "May I come in?"

She gestured, and I followed her into the living room. An open can of Pepsi sat beside her console.

Her eyes were red as she sat on her bench.

"What's up?" she said, and yawned.

"You should be asleep, for one thing," I said.

She shrugged, and nodded.

"Yeah. I can't seem to get in the right phase. Just now I'm in day mode. But Victor, I'm used to working odd hours, and long hours, and you didn't come over here to lecture me about that, did you?"

"No. You say Kluge was murdered."

"He didn't write his suicide note. That seems to leave murder."

"I was wondering why someone would kill him. He never left the house, so it was for something he did here with his computers. And now you're... well, I don't know what you're doing, frankly, but you seem to be poking into the same things. Isn't there a danger the same people will come after you?"

"People?" She raised an eyebrow.

I felt helpless. My fears were not well formed enough to make sense.

"I don't know... you mentioned agencies..."

"You notice how impressed Osborne was with that? You think there's some kind of conspiracy Kluge tumbled to, or you think the CIA killed him because he found out too much about something, or..."

"I don't know, Lisa. But I'm worried the same thing could happen to you."

Surprisingly, she smiled at me.

"Thank you so much, Victor. I wasn't going to admit it to Osborne, but I've been worried about that, too."

"Well, what are you going to do?"

"I want to stay here and keep working. So I gave some thought to what I could do to protect myself.

I decided there wasn't anything."

"Surely there's something."

"Well, I got a gun, if that's what you mean. But think about it. Kluge was offed in the middle of the day. Nobody saw anybody enter or leave the house. So I asked myself, who can walk into a house in broad daylight, shoot Kluge, program that suicide note, and walk away, leaving no traces he'd ever been there?"

"Somebody very good."

"Goddamn good. So good there's not much chance one little gook's gonna be able to stop him if he decides to waste her."

She shocked me, both by her words and by her apparent lack of concern for her own fate. But she had said she was worried.

"Then you have to stop this. Get out of here."

"I won't be pushed around that way," she said. There was a tone of finality to it. I thought of things I might say, and rejected them all.

"You could at least... lock your front door," I concluded, lamely.

She laughed, and kissed my cheek.

"I'll do that, Yank. And I appreciate your concern. I really do."

I watched her close the door behind me, listened to her lock it, then trudged through the moonlight toward my house. Halfway there I stopped. I could suggest she stay in my spare bedroom. I could offer to stay with her at Kluge's.