‘Traitors,’ he muttered. This was his island; they were only here on his sufferance. If he left, they’d be dead within a week: the creatures would take them. Madhusree might try to protect them, but you could never be sure what side she was on. Prabir pictured the crew of a ferry or supply ship, marching warily into the kampung after a missed rendezvous and days of radio silence, to find no one but Madhusree. Waddling around with a greasy smile on her face, surrounded by unwashed bowls bearing the remnants of meals of fried butterflies, seasoned with a mysterious sweet-smelling meat.

Prabir trudged along, mouthing silent curses, gradually becoming aware of the increasing gradient and the dark rocks poking through the soil. Without even thinking about it, he’d ended up on the trail that led to the centre of the island. Unlike the path from the beach to the kampung—cut by the Kai labourers, and Prabir’s job now to maintain—this was the product of nothing but chance, of rocky outcrops and the natural spacing of the trees and ferns.

It was hard work moving up the sloping ground, but he was shaded by the forest, and the sweat that dripped from his elbows or ran down his legs was almost chilly. Blue-tailed lizards darted rapidly out of his way, barely registering on his vision, but there were purple tiger beetles as big as his thumb weaving over one fallen trunk, and large black ants everywhere; if he hadn’t smelt as vile to the ants as the tiger beetles did to him he might have been covered in bites within minutes. He stuck to bare soil where he could find it, but when he couldn’t he chose the undergrowth rather than volcanic rock—it was more forgiving on the soles of his feet. The ground was covered with small blue flowers, olive-green creepers, low ferns with drooping leaves; some of the plants were extremely tough, but they were rarely thorny. That made sense: there was nothing trying to graze on them.

The ground became increasingly steep and rocky, and the forest began to thin out around him. More and more sunlight penetrated between the trees, and the undergrowth became dry and coarse. Prabir wished he’d brought a hat to shield his face, and maybe even shoes; the dark rocks were mostly weathered smooth, but some had dangerous edges.

The trees vanished. He scrambled up the bare obsidian slope of the volcano. After a few minutes in the open, his skin had baked dry; he could feel tiny pulses of sweat, too small to form visible droplets, appear on his forearms and instantly evaporate. In the forest his shorts had been soaked through with perspiration; now the material stiffened like cardboard, and issued a curious laundered smell. He’d sprayed himself with sunscreen before leaving for the beach with Madhusree; he hoped he hadn’t lost too much of it in the water. They should have added some UV-absorbing chemical to his mosquito pellet, sparing him the trouble of applying the stuff externally.

Come the revolution.

The sky was bleached white; when he raised his face to the sun it was like staring into a furnace—closing his eyes was useless, he had to shield himself with his arms. But once he was high enough above the forest to see past the tallest trees, Prabir emitted a parched whoop of elation. The sea stretched out beneath him, like the view from an aeroplane. The beach was still hidden, but he could see the shallows, the reefs, the deeper water beyond.

He’d never climbed this high before. And though his family certainly hadn’t been the first people to set foot on the island, surely no stranded fisherman would have struggled up here to admire the view, when he could have been carving himself a new boat down in the forest?

Prabir scanned the horizon. Shielding his eyes from the glare allowed enough perspiration to form to run down his brow and half blind him. He mopped his eyes with his handkerchief, which had already been marinated in sea water and an hour’s worth of sweat in the forest; the effect was like having his eyelids rubbed with salt. Exasperated, he blinked away tears and squinted, ignoring the pain, until he was convinced that there was no land in sight.

He continued up the side of the volcano.

Visiting the crater itself was beyond him; even if he’d brought water and shoes, the approach was simply too steep. On the basis of vegetation patterns in satellite images, his mother had estimated that the volcano had been dormant for at least a few thousand years, but Prabir had decided that lava was circulating just beneath the surface of the crater, waiting to break free. There were probably fire eagles up there, pecking through the thin crust to get at the molten rock. They could be swooping over him even as he climbed; because they glowed as brightly as the sun, they cast no shadows.

He stopped to check for land every five minutes, wishing he’d paid more attention to the appearance of various islands from the ferry; the horizon was such a blur that he was afraid he might be fooled by a bank of clouds, a distant thunderstorm approaching. He’d cut his right foot, but it wasn’t very painful, so he avoided examining it in case the sight of the wound put him off. The soles of his feet were thick enough to make the heat of the rock bearable, but he couldn’t sit to rest, or even steady himself with his palms.

When an ambiguous grey smudge finally appeared between the sky and the sea, Prabir just smiled and closed his eyes. He didn’t have the energy to feel properly triumphant, let alone indulge in any kind of victory display. He swayed for a moment in the surreal heat, acknowledging his stupidity at coming here unprepared, but still defiantly glad that he’d done it. Then he found a sharp-edged rock and scraped a line at the place, as best as he could judge, where the distant island first appeared.

He couldn’t write the altitude; it probably wasn’t all that different from the five hundred metres he’d naively calculated, but he’d have to return with his notepad to read the true figure off the GPS display. Then he could work backwards to determine the effects of refraction.

The bare line wasn’t enough, though. No natural markings on the rock looked similar, but it wasn’t exactly eye-catching; he’d be pushing his luck to find it again. Carving his initials seemed childish, so he scratched the date: 10 December 2012.

He headed back towards the forest in a happy daze, slipping and cutting his hands on the rocks twice, not really caring. He hadn’t merely named the island, he’d begun to measure it. He had as much claim to stay as his parents, now.

The afternoon thunderstorm came from the north, behind him as he descended. Prabir looked up as the first swollen droplets splashed on to the rocks around him, and saw dazzling beads of white light against the clouds. Then the fire eagles rose up out of the storm, leaving the sky a uniform grey.

He tipped his head back and drank the rain, whispering, ‘Teranesia. Teranesia.’

Prabir arrived back in the kampung around three. No one had missed him; when there was no school he went where he pleased, with his watch to call for help if he needed it. He was exhausted, and slightly nauseous; he went straight to his hut and collapsed into his hammock.

His father woke him, standing by the hammock in the grey light of dusk, speaking his name softly. Prabir was startled; he was meant to help prepare the evening meal, but he could already smell it cooking. Why had they let him sleep so late?

His father put a hand on Prabir’s forehead. ‘You’re a bit hot. How are you feeling?’

‘I’m all right, Baba.’ Prabir balled his fists to hide the cuts on his palms; they weren’t serious, but he didn’t want to explain them—or lie about them, if he could help it. His father looked unusually solemn; was he going to announce the decision to pack him off to boarding school, here and now?

His father said, ‘There’s been a coup in Jakarta. Ambon’s been placed under martial law.’ His tone was deliberately neutral, as if he was reporting something of no consequence. ‘I haven’t been able to get through to Tual, so I’m not sure what’s happening there. But we might not be able to bring in supplies for a while, so we’re going to plant a small garden. And we’ll need you to help look after it. Will you do that?’