«And you produced one?» Marcus enquired.
«Not quite. I proposed expanding our magnetic anomaly detector array. It's a very ancient technology; Earth's old nations pioneered it during the twentieth century. Their military maritime aircraft were equipped with crude arrays to track enemy submarines. Mitchell-Courtney builds its array into low-orbit resource-mapping satellites; they produce quite valuable survey data. Unfortunately, the company turned down my proposal. They said an expanded magnetic array wouldn't produce better results than a spectroscopic sweep, not on the scale required. And a spectroscopic scan would be quicker.»
«Unfortunate for Mitchell-Courtney,» Antonio said wolfishly. «Not for us. Dear Victoria came to me with her suggestion, and a simple observation.»
«A spectrographic sweep will only locate relatively large pieces of mass,» she said. «Fly a starship fifty million kilometres above a disc, and it can spot a fifty-kilometre lump of solid metal easily. But the smaller the lump, the higher the resolution you need or the closer you have to fly, a fairly obvious equation. My magnetic anomaly detector can pick out much smaller lumps of metal than a Dorado.»
«So? If they're smaller, they're worth less,» Katherine said. «The whole point of the Dorados is that they're huge. Believe me, I've been there and seen the operation those ex-Garissans are building up. They've got enough metal to supply their industrial stations with specialist microgee alloys for the next two thousand years. Small is no good.»
«Not necessarily,» Marcus said carefully. Maybe it was his intuition again, or just plain logical extrapolation, but he could see the way Victoria's thoughts were flowing. «It depends on what kind of small, doesn't it?»
Antonio applauded. «Excellent, Captain. I knew you were the right man for us.»
«What makes you think they're there?» Marcus asked.
«The Dorados are the ultimate proof of concept,» Victoria said. «There are two possible origins for disc material around stars. The first is accretion; matter left over from the star's formation. That's no use to us, it's mostly the light elements, carbonaceous chondritic particles with some silica aluminium thrown in if you're lucky. The second type of disc is made up out of collision debris. We believe that's what the Dorados are, fragments of planetoids that were large enough to form molten metal cores. When they broke apart the metal cooled and congealed into those hugely valuable chunks.»
«But nickel iron wouldn't be the only metal,» Marcus reasoned, pleased by the way he was following through. «There will be other chunks floating about in the disc.»
«Exactly, Captain,» Antonio said eagerly. «Theoretically, the whole periodic table will be available to us, we can fly above the disc and pick out whatever element we require. There will be no tedious and expensive refining process to extract it from ore. It's there waiting for us in its purest form; gold, silver, platinum, iridium. Whatever takes your fancy.»
Lady Macbeth sat on a docking cradle in Sonora's spaceport, a simple dull-grey sphere fifty-seven metres in diameter. All Adamist starships shared the same geometry, dictated by the operating parameters of the ZTT jump, which required perfect symmetry. At her heart were four separate life-support capsules, arranged in a pyramid formation; there was also a cylindrical hangar for her spaceplane, a smaller one for her Multiple Service Vehicle, and five main cargo holds. The rest of her bulk was a solid intestinal tangle of machinery, generators, and tanks. Her main drive system was three fusion rockets capable of accelerating her at eleven gees, clustered round an antimatter intermix tube which could multiply that figure by an unspecified amount; a sure sign of her combat-capable status. (By a legislative quirk it wasn't actually illegal to have an antimatter drive, though possession of antimatter itself was a capital crime throughout the Confederation.)
Spaceport umbilical hoses were jacked into sockets on her lower hull, supplying basic utility functions. Another expense Marcus wished he could avoid; it was inflicting further pain on his already ailing cash flow situation. They were going to have to fly soon, and fate seemed to have decided what flight it would be. That hadn't stopped his intuition from maintaining its subliminal assault on Antonio Ribeiro's scheme. If he could just find a single practical or logical argument against it . . .
He waited patiently while the crew drifted into the main lounge in life-support capsule A. Wai Choi, the spaceplane pilot, came down through the ceiling hatch and used a stikpad to anchor her shoes to the decking. She gave Marcus a sly smile that bordered on teasing. There had been times in the last five years when she'd joined him in his cabin, nothing serious, but they'd certainly had their moments. Which, he supposed, made her more tolerant of him than the others.
At the opposite end of the spectrum was Karl Jordan, the Lady Mac 's systems specialist, with the shortest temper, the greatest enthusiasm, and certainly the most serious of the crew. His age was the reason, only twenty-five; the Lady Mac was his second starship duty.
As for Schutz, who knew what emotions were at play in the cosmonik's mind; there was no visible outlet for them. Unlike Marcus, he hadn't been geneered for free fall; decades of working on ships and spaceport docks had seen his bones lose calcium, his muscles waste away, and his cardiovascular system atrophy. There were hundreds like him in every asteroid, slowly replacing their body parts with mechanical substitutes. Some even divested themselves of their human shape altogether. At sixty-three, Schutz was still humanoid, though only twenty per cent of him was biological. His body supplements made him an excellent engineer.
«We've been offered a joint prize flight,» Marcus told them. He explained Victoria's theory about disc systems and the magnetic anomaly array. «Ribeiro will provide us with consumables and a full cryogenics load. All we have to do is take Lady Mac to a disc system and scoop up the gold.»
«There has to be a catch,» Wai said. «I don't believe in mountains of gold just drifting through space waiting for us to come along and find them.»
«Believe it,» Roman said. «You've seen the Dorados. Why can't other elements exist in the same way?»
«I don't know. I just don't think anything comes that easy.»
«Always the pessimist.»
«What do you think, Marcus?» she asked. «What does your intuition tell you?»
«About the mission, nothing. I'm more worried about Antonio Ribeiro.»
«Definitely suspect,» Katherine agreed.
«Being a total prat is socially unfortunate,» Roman said. «But it's not a crime. Besides, Victoria Keef seemed levelheaded enough.»
«An odd combination,» Marcus mused. «A wannabe playboy and an astrophysicist. I wonder how they ever got together.»
«They're both Sonoran nationals,» Katherine said. «I ran a check through the public data cores, they were born here. It's not that remarkable.»
«Any criminal record?» Wai asked.
«None listed. Antonio has been in court three times in the last seven years; each case was over disputed taxes. He paid every time.»
«So he doesn't like the taxman,» Roman said. «That makes him one of the good guys.»
«Run-ins with the tax office are standard for the rich,» Wai said.
«Except he's not actually all that rich,» Katherine said. «I also queried the local Collins Media library; they keep tabs on Sonora's principal citizens. Mr Ribeiro senior made his money out of fish breeding, he won the franchise from the asteroid development corporation to keep the biosphere sea stocked. Antonio was given a fifteen per cent stake in the breeding company when he was twenty-one, which he promptly sold for an estimated eight hundred thousand fuseodollars. Daddy didn't approve, there are several news files on the quarrel; it became very public.»