The Tantors found him on the trail between the camp and the lander, on his own, with no sign of the cargo sled he was supposed to have been dragging from the airlock. From his footprints it was clear that he had never reached the ship, nor had any intention of doing so. He had set off with only one goal in mind: the taking of his own life. These last days must have seen him marking time, waiting to learn whether the virus functioned in the intended fashion. Once he had his evidence, he was free to remove himself from the expedition.
None of this was immediately apparent to Goma, or indeed to any of her associates. All they had was a dead man, brought in by elephants. Heeding Eunice, the three spacesuited Tantors had remained outside after depositing Nhamedjo in the airlock. They had found his helmet close to his body and brought that back, too.
‘If it turns out they killed him…’ Vasin said, apparently thinking aloud.
‘I think he did this to himself,’ Goma said. ‘Look at his suit. It’s not like Eunice’s. The Tantors wouldn’t have known where to start opening it, even if they had the right tools on their trunks.’
‘Maybe they did?’ said Loring. ‘Went out to fix equipment, didn’t they?’
‘They had tools,’ Eunice confirmed flatly. ‘Trunk attachments, adaptors — stored in those panniers on their suits. They could have swapped them on and off easily enough — it’s how they work in vacuum. But do you see any signs of a struggle, scratches or damage to his suit?’
‘They’re so strong, he wouldn’t have had a chance to struggle,’ Loring said.
‘No, but he’d have had ample time to run away. They don’t move quickly in those suits. Even if they cornered him — which they didn’t — your friend would have had time to call us.’
‘Can’t have committed suicide,’ Loring said. ‘He went out there to help us? To fetch the medical equipment?’
‘To delay the actual act,’ Goma said. ‘To buy more time for the infection to take hold, to make the medicines less likely to help. He never had any intention of coming back.’
‘You’re very sure of his guilt,’ Vasin said.
‘He put the disease in Ru.’
‘You don’t know this.’
‘No, Gandhari, but who else could have done it? He had the opportunity, with Ru not being well enough to come out of skipover at the same time as the rest of us — and how do we know that was even true? We just took his word — he was the doctor. It gave him all the time he needed to pump her full of whatever nasty crap he needed to. I should have seen it sooner. Grave always said there was another saboteur among us.’
‘You’re forgetting something,’ said the captain. ‘Doctor Nhamedjo was openly critical of my handling of Grave. Of all us, he was the one who expressed the most scepticism concerning Grave’s guilt.’
‘He was clever, that’s all — he knew full well that nothing he said would make a blind bit of difference. Look at me — the innocent, thoughtful Doctor Nhamedjo.’
‘We can argue his guilt in due course,’ Karayan said, ‘but right now we still need those medical supplies. I am willing to return for them.’
‘The Tantors are still out there,’ said Loring.
‘Then I will exercise caution.’
They watched Karayan leave, dragging the sled behind him — light now that it was unladen. Eunice had warned Atria, Mimosa and Keid that another person would soon be on the move, and their shuffling, spacesuited forms were visible from a number of topside windows as they waited for further instructions.
‘Why don’t you send them to the lander?’ Goma asked. ‘They can help carry extra supplies.’
‘It’s that clear-cut to you, is it?’ Eunice snapped back. ‘Nhamedjo is dead, case closed? None of you had the slightest inkling of his guilt until just now, so how do I know I can trust any of you?’
‘You don’t,’ Goma said. ‘But you can begin by excluding Ru. She didn’t have a clue what he’d put in her.’
‘She’s still infected — still a lethal agent.’
‘You have her under quarantine, and pretty soon you’re going to have more medicines and tools at your disposal. At least start treating Ru as the victim, not the perpetrator.’
‘I’d like to contact Travertine,’ Vasin said. ‘I can speak to it via my suit, but it’ll be simpler if you just give us a direct line. Are we in the right alignment for that?’
Eunice nodded at the ceiling. ‘Your ship is overhead.’
‘Then let me talk to Nasim Caspari.’
‘Another trustworthy soul?’
‘I’m going to ask him to put a lock on Nhamedjo’s quarters and medical suite. I’ll want a complete search of his personal effects and a more thorough examination of his background than anything we’ve performed to date. Clearly we missed something.’
‘You have a fine talent for understatement.’
‘Then I’ll ask Andisa to start working with us to find a cure for Sadalmelik and the others, just as soon as our analysers have a look at the blood samples. You’ve met six of us—’
‘Yes, and hasn’t that gone well.’
‘There are forty-six more of us in space — forty-seven if I decide to thaw Peter Grave, which is at least an outside possibility at this point. That’s a lot of expertise — more than any of us has on our own, and that includes you, Eunice. If we made a mistake about Nhamedjo, then I’m truly sorry. But the only way out is via cooperation, and that means none of us acting rashly.’ Vasin looked at Goma. ‘I concur that Ru must remain in quarantine — that’s the only sensible option — but she must be informed that we do not think she is culpable. Do you accept that, Eunice?’
‘Nothing is proven either way.’
‘I’m not insisting on proof, just a little reasonableness. I am willing to turn over the resources of my entire starship to help you and the Tantors — now give me something back.’
‘You made this mess.’
‘You invited us,’ Vasin replied.
Of course there were no miracles to be had, except of the modest kind permitted by the exigencies of medicine and time. Karayan came back with a sled-load of supplies, and on the second trip the suited Tantors returned to the lander to help with additional logistics. Vasin outlined the situation to Caspari, and with all haste her desired arrangements were put in place. The lander’s medical analysers were patched through to Travertine and additional blood samples taken from both Tantors and humans. The remaining members of Nhamedjo’s medical staff — presumed innocent until otherwise proven — were assigned the task of processing this data, first to select the best therapeutic approach based on the existing medical stocks, and secondly to attempt synthesis of a targeted antiviral drug.
Not all of the news was against them. Atria, Mimosa and Keid had completed repairs on one of Eunice’s remote transmitters, which in turn allowed for better and more prolonged communications with Travertine. The starship, meanwhile, had now dispersed relay satellites into its own orbit, furthering their chances of remaining in contact. Vasin returned to the lander and moved it closer to the camp, allowing a flexible pressure bridge to be strung from one of the airlocks. This in turn permitted the humans to move more easily from one to the other.
Ru’s virus was detected at low concentrations in all the expedition members, most notably Goma, but not at a level where infection was a strong likelihood. After more than a day all remained asymptomatic, confirming that the virus had been engineered to avoid obvious detection.
‘Nhamedjo would have seen it in our blood,’ Goma said. ‘That’s a given. But no one was looking over his shoulder, doubting his word.’
Eunice remained entirely free of infection, although in other respects she appeared fully human, it was clear that she had some sort of immune system.
‘To think I let that bastard examine me,’ she said. ‘He was close enough that I could have snapped his neck like a dry twig.’
‘Would you have, if you’d known?’
‘In an instant.’
‘That would have done wonders for diplomacy. Anyway, the damage was done by then — Ru was already primed to infect the Tantors. For all we know he tainted her blood while the rest of us were still in skipover. With hindsight, it makes sense that he’d concentrate his efforts on one of us — we were always going to be among the first to contact them.’
‘I’d rather you didn’t speak of this making sense, Goma. Not while Sadalmelik is dying.’
‘I’m just saying there’s a twisted logic to it. He must have rejoiced when we put Peter Grave into skipover.’
‘Then this other man is definitely innocent?’
‘I think he and Mposi were trying to flush out the real saboteur. Grave confided in Mposi and they arranged to meet, but Doctor Nhamedjo got to Mposi first. When Gandhari digs into his background, I’ll be interested to know if he had expertise in nanotechnology.’
‘Why?’
‘That’s how he hoped to get rid of Mposi.’
‘I am sorry about that. I remember Mposi, although he was a much younger man when I knew him. I would have liked to meet the older version — to see the person he grew into. And Ndege, of course.’
‘You only thought to ask one of them to come.’
‘I did not have the luxury of sending a long and involved message. Besides, Ndege was the one who had the best knowledge of Tantors — the one most likely to impress Dakota. Well, my plans did what plans have a habit of doing.’ But she touched Goma’s hand. ‘You are blameless in this. I understand that.’