There were chambers full of foamy white eggs, and a bloated queen the size of a human thumb.
Prabir said, ‘What does the orchid get out of it?’
‘Maybe just food scraps and excrement; that could be more than enough. Or maybe the ants are feeding it something specific, some secretion tailor-made to keep it happy and fit.’ Grant was clearly elated, but then she added wistfully, ‘Someone’s going to spend a lifetime on this.’
‘Why not do it yourself?’
She shrugged. ‘Not my style. Begging to foundations for charity to do something beautiful and useless.’
Prabir felt like grabbing her by the shoulders and shaking her; this sounded so defeatist. He said, ‘Maybe in a few years you’ll feel differently. Once you’re not facing the same financial pressures—’
Grant pulled a face. ‘Don’t organise me; I hate that. No wonder your sister ran away from home.’
Prabir crouched down beside the orchid. ‘First mimicry, now symbiosis. These gene-recovery enzymes of yours can hit a bull’s-eye at fifty million years.’
‘And don’t gloat, it doesn’t suit you. I admit it, freely: there’s something going on here that I don’t understand.’
Prabir said, ‘I still think your basic idea must be right. Functional genes take thousands of years to develop. If they appear overnight, the organism has to be cheating. “Here’s one I prepared earlier.” What else can it be?’
Grant seemed ready to accept this, but then she shook her head. ‘I can’t answer that, but it’s starting to look as if I’m missing something fundamental. Perfectly camouflaged birds with no predators. Thorned plants with nothing even trying to munch on them. There are misses as well as bull’s-eyes. But even the misses are too
She squatted beside Prabir. The ants were methodically criss-crossing the tear in the stem, secreting a papier-mache-like scaffolding a thousand times faster than any plant could have grown new tissue. She said, ‘Don’t you wish you could just ask them for the whole story? When did they get together and sort this all out? Why did they stop? Why did they start again? What is it we don’t understand?’
It was late morning on the second day when they reached the mangrove swamp. They were at least a kilometre inland, but there was a narrow valley running from the heart of the jungle to the coast, its floor a would- be river bed with too little runoff feeding it to prevent sea water flooding in at high tide. At low tide, the halophytic trees would stand naked in an expanse of salty mud, but that was still hours away; for now, the way ahead was inundated.
Grant peered into the tangle of branches and aerial roots. ‘It’s only a few hundred metres across. We should be able to wade through without too much trouble.’
‘And then time it so we can cross back at low tide?’
‘Yeah.’
Prabir found that part appealing; if they had to do this at all, he’d rather do it while he still had the energy.
He double-checked that all the sample tubes he was carrying were sealed; his watch and notepad were fully waterproof. There didn’t seem much point taking any of his clothes off; they’d get coated in slime however he carried them, and the more protection he had against scrapes and splinters from the roots, the better.
Grant waded in up to her knees. Prabir followed her, every step like an exaggerated mime of walking as his boots stuck afresh in the mud. The water was turbid with silt, almost opaque where it could be seen at all, but most of the surface was covered with a layer of algae and dead leaves. The odour of salt and decay was insistent— like breathing over a garden compost heap with seaweed added for effect—but not overpowering or stomach- turning. Other parts of the forest had smelt worse.
The protruding brown roots of the mangroves were dotted with snails, but Prabir spotted small brown crabs as well. Clouds of mites and mosquitoes approached them and then backed away; at least their repellent was holding out. The trees were twenty or thirty metres tall; it was eerie to look up into the branches, decorated with small white blossoms and tiny green fruit, then down into what was essentially dirty sea water, as if a forest had sprouted in the middle of the ocean.
The mud was annoying, but it wasn’t treacherous; the hidden mangrove roots were far more pernicious. Every time Prabir thought he’d learnt to judge where a clear stretch of ground might lie between two trunks, he walked into a root at shin height. The water was above his waist now, and the clues from the visible roots were getting harder to read. He’d started out following directly behind Grant, unashamedly letting her blaze the trail, but then his concentration had lapsed, and he’d skirted a submerged obstacle on his own to find that they’d been shunted to either side of it. Since then, they’d been moving further apart, following entirely separate paths through the drowned maze.
Grant called out to him, ‘Hey, watch out!’ Prabir looked around; a black snake about a metre long with narrow yellow stripes was swimming towards him. He scanned the tangle of litter around the nearest trunk, looking for a forked stick he could use to persuade the snake to keep its distance, but it veered away of its own accord, blinking elliptical green eyes like a cat’s.
The water grew deeper, reaching high on his chest; the trees thinned slightly, but not enough to compensate for the loss of visibility. Grant was a few centimetres shorter than he was, and she was submerged almost up to her chin. Prabir shouted, ‘Next time, we cheat and take the boat around the coast.’
‘Amen to that.’
‘I don’t want to come back this way, even when the tide’s out. We’d be better off walking along the beach, and swimming across the inlet if we have to.’
Grant swore suddenly; Prabir assumed she’d just been bruised twice in the same spot in rapid succession, which was particularly painful. She shouted, ‘This is ridiculous! I’m going to try swimming, here and now.’ She leant forward into the water and began a slow breast-stroke.
Prabir observed the experiment with interest. She was scooping aside some of the surface muck as she went, but it was still piling up around her face and shoulders. ‘What’s it like?’
‘Not too bad. The current’s pretty strong, though.’ She wasn’t exaggerating; as the water carried her sideways she almost collided with a trunk, but she managed to swim clear of it. It looked no more dangerous than tripping through the roots, and a whole lot faster.
Grant was wearing light canvas shoes; Prabir would have to take his boots off to swim. He hesitated, wondering if it was worth the trouble. He crouched down, submerging his head to reach the laces, but they were too slippery and waterlogged to untie; his fingernails slid uselessly over the knots he’d made to secure the bows.
He stood up, scraping mulch off his face. Grant was no longer in sight.
He shouted after her, ‘Wait for me at the shore!’
A faint reply came back. ‘Yes!’
Prabir trudged on, occasionally making a half-hearted attempt to swim over obstacles. He’d grown fitter over the last two weeks, and reached the point where their normal day-long excursions were bearable, but just stepping over the endless, unpredictable succession of mangrove roots was turning the muscles in his legs to jelly. Once he was out of this shit-hole, he had no intention of spending three hours gathering samples for Grant; he’d walk down to the ocean, wash the slime off his body, and curl up under a palm tree. How had she managed to stretch his unpaid duties so far beyond bad translations, bad cultural advice, and surprisingly reasonable cooking?
He could see a grassy clearing ahead, with ordinary trees behind it. The water was still up to his chest, but dry land was just ten or fifteen metres away. He shouted, ‘Grant? I’ve had enough! I’m going on strike!’ If she was in earshot she didn’t deign to reply.
The ground climbed abruptly, the water dropped to waist height; the shore was within reach, no longer an unattainable mirage. Prabir’s shins collided with an obstacle that felt like a large fallen branch; wearily, he stepped back in order to step over it, but then his calves hit something behind him, just as high, that felt much the same.
For a moment he was simply bemused. Could he have sleep-walked right over the first branch, without even noticing it?
Then the gap between the two obstacles tightened, and he realised that they were parts of the same thing.
He quickly pulled his right foot out of the enclosing coil, and probed forward for a safe place to put it. As his
