They were in the top of the fog now. Towering and silent, pillars of haze drifted by on either side of them. Starlight dimmed and brightened.
Behind them, the node Juan had left was dimming toward a zero data rate. He picked out a second breadcrumb, gave it correct startup call, and dropped it to the side of the trail. The low-layer diagnostics showed its pale glow, and after a second it had picked up on the first node, now bright again. "They linked ... I'm getting data forwarded from the first node." Hah. Normally you didn't think about details like that. The gadgets kind of reminded Juan of the toy network his father had bought him, back when Pa still had a job. Juan had been only five years old, and the toy nodes had been enormous clunkers, but laying them down around the house had engaged father and son for several happy days—and given Juan an intuition about random networks that some grownups still seemed to lack.
"Okay, I see them," said Miri. "We're not getting any communication from beyond the dungballs, are we? I don't want anything forwarded out to the world."
Yeah, yeah. This is a local exam. "We're isolated, unless we punch out with something really loud." He threw out five or six more breadcrumbs, enough so they could figure their relative positions accurately; in his diagnostic view, the locator gleams sharpened from misty guesstimates to diamond-sharp points of light.
Fog curled more thickly over them, and the starlight grew hazy. Ahead of him, Miri stumbled. "Watch your step.... You know, there's really not enough light anymore."
In patches, the fog was so thick that VIS AMP was just colorful noise.
"Yeah, I guess we should switch back to thermal IR."
They stopped and stood like idiots, fiddling with manual controls to do something that should have been entirely automatic. Near infrared was as bad as visuaclass="underline" for a moment he watched the threads of NIR laser light that flickered sporadically between the data ports on their clothes; in this fog, the tiny lasers were only good for about five feet.
Miri was ahead of him. "Okay, that's a lot better," she said.
Juan finally got his goggles back to their thermal infrared default. Miri's face glowed furnace-red except for the cool blackness of her goggles. Most plants were just faintly reddish. The stairstep timber by his feet had three dark holes in the top. Juan reached down and discovered that the holes felt cold and metallic. Ha, metal spikes holding the timber in place.
"C'mon," said Miri. "I want to get down near the bottom of the canyon."
The stairs were steep, with a heavy wood railing on the dropoff side. The fog was still a problem, but with TIR, you could see out at least ten yards. Dim reddish lights floated up through the dark, blobs of slightly warmer air. The bottom was way down, farther than you'd ever guess. He threw out a few more breadcrumbs and looked back up the path, at the beacons of the other nodes. What a bizarre setup. The light of the breadcrumb diagnostics was showing on his contact lenses, where he normally saw all enhancements. But it was the USMC goggles that were providing most of the augmentation. And beyond them? He stopped, turned off his wearable enhancement, and slipped the goggles up from his face for a moment. Darkness, absolute darkness, and chill wet air on his face. Talk about isolation!
He heard William coming up behind him. The guy stopped and for a second they stood silent, listening.
Miri's voice came from further down the steps. "Are you okay, William?"
"Sure, no problems."
"Okay. Would you and Juan come down by me? We wanna stay close enough to keep a good data rate between us. Are you getting any video off the dungballs, Juan?" Bertie had said they contained basic sensors.
"Nope," Juan replied. He slipped the goggles back on and walked down to her. Any breadcrumb video would have shown up on his contacts, but all he was getting was diagnostics. He started another breadcrumb and tossed it far out, into the emptiness. Its location showed in his contacts. It fell and fell and fell, until he was seeing its virtual gleam "through" solid rock.
He studied the diagnostics a moment more. "You know, I think they are sending low data rate video—"
"That's fine. I'll settle for wireless rate." Miri was leaning out past the railing, staring downwards.
"—but it's not a format I know." He showed her what he had. Bertie's Siberian pals must be using something really obscure. Ordinarily, Juan could have put out some queries and had the format definition in a few seconds; but down here in the dark, he was just stuck.
Miri made an angry gesture. "So Bertie gave you something that could be useful, but only if we punch out a loud call for help? No way. Bertie is not getting his warty hands on my project!"
Hey, Miri, you and I are supposed to be a team here. It would be nice if she would stop treating him like dirt. But she was right about Bertie's tactics. Bertie had given them something wonderful—and was holding back all the little things that would make it useable. First it was the enable-protocol, now it was this screwball video format. Sooner or later, Bertie figured they'd come crawling to him, begging him to be a shadow member of the team. I could call out to him. His clothes had enough power that he could easily punch wireless as far as network nodes in Del Mar Heights, at least for a few minutes. Getting caught was a real risk; Fairmont used a good proctor service—but it was impossible for them to cover all the paths all the time. This afternoon, Bertie had as much as bragged they would cheat that way.
Damn you, Bertie, I'm not going to break isolation. Juan reviewed the mystery data from the breadcrumbs. There seemed to be real content; so given the darkness, the pictures were probably thermal infrared. And I have lots of known video I can compare them to, everything that has been seen through my goggles during the last few minutes! Maybe it was time for some memory magic, the edge he got from his little blue pills: If he could remember which blocks of imagery might match what the breadcrumbs could see, and pass that to his wearable, then conventional reverse engineering would be possible.... Juan's mind went blank for a few seconds, and there was a moment of awesome panic ... but then he remembered himself. He fed the picture pointers back to his wearable. It began crunching out solutions almost immediately. "Try this, Miri." He showed her his best guess-image, and sharpened it over the next five seconds as his wearable found more correlation spikes.
"Yes!" The picture showed the roots of the big pine a dozen yards behind them. A few seconds passed and there was another picture, black sky and faintly glowing branches. In fact, each breadcrumb was generating a low-resolution TIR image every five seconds or so, even though they couldn't all be forwarded that fast. "What are those numbers all about?" Numbers that clustered where the picture detail was most complex.
Oops. "Those are just graphical hierarchy pointers." That was true, but exactly how Juan used them was something he didn't want pursued. He made a note to delete them from all future pics.
Miri was silent for several seconds as she watched the pictures coming in from the crumbs above them on the trail, and from the one that he'd dropped way down. Juan was on the point of asking for payback, like some straight talk about exactly what they were looking for. But then she said, "This picture format is one of those Siberian puzzles, isn't it?"
"Looks like."
Those formats were all different, created by antisocials who seemed to get a kick out of not being interoperable. "And you untangled it in fifteen seconds?"