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〃There used to be herds this size all over parts of Earth and Blue Haven；〃 Jonny said。 〃I wish I knew how they'd been hunted。 Well。 We don't have anything like real explosives aboard； and we don't yet know what this species〃 predators even look like。 I suppose that leaves close…in work with lasers and sonics。〃
〃Laser range isn't that short…oh。 Right。 If they don't see us； there's no guarantee they'll figure out which way to run。〃
〃Or even notice they're being killed off。〃 Jonny thought for a minute； but nothing else obvious came to mind。 〃Well 。。。 let's try buzzing them with the car first。 Maybe that'll do the trick。〃
But the animals apparently had no enemies that were airborne。 pletely oblivious to the darting craft above them； they continued stolidly on their way。 〃We do it the hard way now？〃 one of the others asked。
Banyon nodded。 〃Afraid so。 But hopefully not too hard。 Saving the biologists some work isn't worth anyone getting killed over。〃
〃Or even hurt；〃 Jonny put in。 〃We'll just…〃
A ping from the car's phone interrupted him。 〃Governor； we've got something here that may or may not mean anything；〃 Captain Shepherd said； his attention somewhere off…camera。 〃The satellite's been pleting its large…scale geosurvey 。。 。 and it looks very much like that herd is running along one of the planet's magnetic field lines。〃
Banyon looked at Jonny； eyebrows raised。 〃I thought the only things that used geomagnetic navigation were birds； insects； and tweenies；〃
〃So did all the Menssana's biologists；〃 Shepherd returned dryly。 〃But they admit there's no reason something larger couldn't make use of the mechanism。〃
〃If we assume they're indeed paralleling the field lines； is the camp still in danger？〃 Jonny asked。
〃Yes。 The probability actually goes up a couple of points。〃
Jonny looked questioningly at Banyon。 〃Worth a try；〃 the other grunted。 〃Captain； is there anything aboard the ship that can generate a strong magnetic field？〃
〃Sure…the drive modulators。 All we'll need to do is pull off some of the shielding and we'll get enough field leakage to overwhelm their direction finders。 If that's what's really happening。〃
〃It's worth trying；〃 Banyon repeated。 〃How fast can you get that shielding off？〃
〃It's already being done。 Say another hour at the most。〃
The gently rolling terrain could not by any stretch of the imagination be called hilly； but even so the flatfoot herd was audible long before it could be seen。 Standing a few meters back from the main line of Cobras； Jonny wiped the perspiration off his palms as the thunder steadily grew； hoping this was going to work。 In theory； the Cobra's antiarmor lasers should be able to make fungus feed out of the herd if something went wrong 。。。 but Jonny couldn't help remembering how hard the equally herbiverous gantuas of Aventine were to kill。
〃Get ready；〃 his phone said。 He glanced up to see the car as it hovered above and ahead of the Cobras。 〃You'll see them any minute now。 Wait for the captain's signal。。。。〃
And the leading edge of the herd came over a low rise； like a dark tsunami clearing a breakwater。
They weren't heading directly toward the Cobras； and in actual size were quite a bit smaller than gantuas； but the sheer numbers and ground…level view more than made up for it。 Jonny clenched his jaw firmly； fighting hard against the urge to turn and run for cover 。 。 。 and as the wave poured over the rise a new voice on the phone barked； 〃Now！〃
The answer was a volley of Cobra antiarmor lasers… directed not at the flatfoots； but at the clusters of boulders the Cobras had wrestled into position fifty meters closer to the herd。 Very special boulders 。。。 and if the Menssana's geologists had been right about that particular formation…
They had。 The mix of high… and low…expansion minerals in each boulder could survive for only a second or less under a laser's glare before disintegrating with a crack that was audible even over the herd's rumble。 Like a string of firecrackers the boulders blew up as the Cobras continued their sweep 。。。 and like firecrackers； they actually produced little more than noise。 But it was enough； and as the herd's headlong rush faltered in sudden confusion； Jonny could almost see them lose their internal sense of direction。 An instant later the hesitation was gone and the herd had doubled its speed to a flat…out run 。。。 but in the slightly altered direction the Menssana's additional magnetic field was defining for them from the ship's new position some ten kilometers away。 The flank of the herd would now miss the line of Cobras； and when the Menssana lifted in an hour or so and the flatfoots resumed their original direction their path would be shifted at least a kilometer out of the way of the human encampment。
Theoretically。 But there would be time to make sure。
The aircar was dropping toward the ground and the Cobras were beginning to converge on it。 〃Good job；〃 Banyon's voice came from Jonny's phone。 〃Let's head back。〃
The last few clouds had cleared shortly before sunset； and the night sky was alive with stars。 Walking hand in hand just inside the perimeter； Jonny and Chrys took turns naming the recognizable constellations and trying to match the more distorted ones with their Aventinian counterparts。 Eventually； they ran out； and for a time they just walked in silence； enjoying the night air。 Jonny； his audio enhancers activated； heard the faint roar before Chrys did； and by the time she took notice the steady volume level showed their plan had succeeded。
〃The flatfoot herd？〃 she asked； peering off into the darkness。
〃Right；〃 he nodded。 〃And they're not getting any closer。 At least a kilometer away…maybe two。〃
She shook her head。 〃Strange。 I remember some biology class in school where the instructor took it upon himself to 〃prove〃 that no land animal larger than a condorine could ever evolve with a magnetic sense unless there was some ridiculously high local field present。 I wish he was here to see this。〃
Jonny chuckled。 〃/ remember reading about the old theory that all the native plants and animals on the various Dominion worlds were mutated descend…ents of spores or bacteria that had ultimately been blown there by solar winds from Earth。 The argument was still going strong when the Trofts and Minthisti were found； I understand； and I have no idea what its proponents made of Aventine。 If there are still any of them around。 I guess the possibility of making a public fool of yourself is just one of those risks scientists have to face。〃
〃You know； that universal genetic code thing has always bothered me； too；〃 Chrys mused。 〃Why should all the life we find show the same DNA and protein forms？ It doesn't seem reasonable。〃
〃Even if that turns out to be the only workable structure？〃
〃I've never liked that theory。 It seems arrogant； somehow。〃
Jenny shrugged。 〃I don't especially care for it either。 I've heard the Troft theory is that some major disaster three or four billion years ago nearly sterilized this whole region of space； taking with it an early starfaring people。 The algae and bacteria that survived on each world were therefore all from one mon stock； though they've since evolved independently。〃
〃That must've been one gantua of a disaster。〃
〃I think it was supposed to be either a chain of supernovas or the final collapse of the galaxy's central black hole。〃
〃Jh…huh。 Almost simpler to believe God set it up this way deliberately。〃
〃Certainly makes a colonist's life easier to be able to digest the local flora and fauna；〃 Jonny agreed。
〃Though the vice versa is occasionally a problem。〃
Jonny tensed； but Chrys's tone hadn't been one of accusation。 〃I appreciate your letting me go with the others today；〃 he said； as long as they were now on the topic。 〃I know I promised to stay out of things on this trip…〃
〃You could hardly hold out when you were needed；〃 she put in。 〃And it wasn't like you were in serious danger out there。 Were you？〃
〃No； not with the aircar and Menssana as backup。 Still； I'll try to behave myself the rest of the trip。〃
She chuckled and gave his hand a squeeze。 〃It's all right； Jonny。 Really。 I wouldn't want you to just sit on your hands when you're needed。 Just be careful。〃
〃Always；〃 he assured her； wondering at her abrupt attitude change。 This was the old Chrys back again； the one who'd been so supportive of his service when they were first married。 What had happened to change her？ Was she simply reacting to the new environment； slipping into old thought patterns with the reminder of their past struggles on Aventine？
He didn't know。 But he liked the change 。。。 and he had the rest of the trip to figure out how to keep her this way when they returned home。
Chapter 10
The clearance to remove their filter helmets had e from the Dewdrop just before the evening's medical exam； and in the hours between then and bedtime Joshua thought his nose had bee thoroughly accustomed to the exotic scents of Qasama's air。 But the group hadn't taken more than three steps outside their guest house in the morning before Joshua realized that belief had been a little premature。
The new odor seemed to be a mixture of baking aromas with some not…quite…aromatic smoke with something he couldn't begin to identify。
He apparently wasn't the only one。 〃What is that I smell？〃 Cerenkov asked Moff； sniffing the breeze。
Moff inhaled thoughtfully。 〃I smell the bakery one street down； the boron refinery； and the exhaust of vehicles。 Nothing more。〃
〃A boron refinery？〃 Rynstadt spoke up。 〃In the middle of the city？〃
〃Yes。 Why not？〃 Moff asked。
〃Well 。。 。〃 Rynstadt floundered a bit。 〃I would assume it would be safer to put industries like that away from populated centers。 In case of an accident or something。〃
Moff shook his head。 〃We have no accidents of any
consequence。 And the equipment itself is safest right where it is。〃
〃Interesting；〃 Cerenkov murmured。 〃Could we see this refinery？〃
Moff hesitated a second； then nodded。 〃I suppose that would be permissible。 This way。〃
Bypassing the car waiting for them at the curb； he set off； the four Aventinians and five other Qasamans following。 The refinery turned out to be less than a block away； located in an unremarkable building midway between two of Sollas's extra…wide avenues。
Joshua had never seen this kind of light industrial plant before； and the masses of tanks； pipes； and bustling Qasamans gave him more of a feeling of confusion than of productivity。 But Rynstadt…and to a lesser extent York…seemed fascinated by the place。 〃Very nice setup；〃 Rynstadt mented； gazing around the main room。 〃I've never heard of a boron extraction method using cold bubbled gas。 What gas is that； if I may ask？〃
〃I'm really not sure；〃 Moff said。 〃Some sort of catalyst； I expect。 You are an expert in this sort of chemistry？〃
〃No； not really；〃 Rynstadt shook his head。 〃I dabble in a lot of fields…my job as an educator requires me to know bits and pieces of almost every subject。〃
〃A general scientific expert； then。 I see。〃
There was something about the way Moff said that that Joshua didn't care for； as if Rynstadt's supposed expertise had added a point against the mission's peaceful image。 〃Would something tike this method be marketable on Aventine； Marck； do you think？〃 he spoke up； hoping Rynstadt would pick up the cue。
He did。 〃Almost certainly；〃 the other nodded at once。 〃Boron plays a major part in at least a dozen different industries； and while our methods aren't expensive something cheaper would always be wele。 Perhaps we can discuss this in more detail
later； Moff； either with Mayor Kimmeron or someone in planetary authority。〃
〃I'll pass on your request；〃 Moff said。 His tone was neutral； but to Joshua's eye he seemed to relax just a bit。 Like tiptoeing through a mine field with these people； he thought。
〃Well； I think we might as well move on； then；〃 Cerenkov said briskly。 〃I'd still like to see the art gallery you mentioned yesterday； and perhaps one of your marketplaces。〃
〃Of course；〃 Moff agreed。 〃Back to the car； then； and we'll be off。〃
〃Well？〃 Telek asked。
Christopher straightened up from his terminal。 〃I don't find any reference to this kind of boron refinement met