“Dia…”

She seemed to slump, as if the Air was collapsing out of her. “We’re going to spend the rest of our lives here. Right here. Dying off one by one. Aren’t we, Mur?”

Philas and Mur dived away from the forest and into the Mantle. The tetrahedral artifact might be as much as a half-day away, so they each carried a bag containing a little of the tribe’s precious, and dwindling, supply of pig-meat.

At first Mur looked back frequently into the Crust-forest. Dia’s face, turned down like a small, round leaf, followed them as they descended, her expression soon too distant to read. Then she ducked back into the forest. For a while Mur was able to follow the movements of the other Human Beings as they worked through the forest, using the time to hunt and to repair damaged tools, ropes and clothes. But at last the site of the Human Beings’ temporary camp was lost in the swirling, complex tapestry of trunks and branches that made up the Crust-forest.

Mur spent some time staring up at the forest, carefully committing the pattern of trunks to memory so they could find the Human Beings again.

Philas descended toward the artifact without speaking. Her thin face was intent on the goal, empty of expression; Mur hadn’t seen her so focused since the death of Esk. She dug into her pouch and, with efficient regularity, bit into a piece of meat.

Mur, alone with his thoughts, fell through the vortex lines. The artifact, and the little colony around it, grew in his vision tantalizingly slowly. But it wasn’t long before he could see without ambiguity that the artifact was indeed a tetrahedron, around ten mansheights to a side.

The story of the Colonists, and their Core Wars, was part of the lore of the Human Beings. When the Ur-humans first reached the Star, having traveled from their own unimaginable worlds, the Star was empty of human life. The Colonists had been the first generation to be established within the Star, by the Ur-humans. It had been their task to spawn the first of the Star’s true inhabitants: all of them, the mortal, frail ancestors of the Human Beings, the people of Parz and the hinterland, all the inhabitants of the Mantle.

Compared to Human Beings the Colonists had been like gods. They had more in common with the Ur-humans, perhaps, Mur speculated. With Ur-human technology they had pierced the Mantle with wormhole links and established huge Cities which had sailed through the Mantle in vast, orderly arrays. The first generations of Human Beings had worked with their progenitors, traveling the wormhole links and building a Mantle-wide society.

Then the Core Wars had come.

As they neared the artifact, and the irregular little settlement around it, excitement gathered in Mur. Fatigue and hunger worked on him as he Waved, and he became aware that his thinking was becoming looser, more fragmented. His head seemed filled with visions, with new hopes; and the aches of his tired, protesting body seemed to fade. Could these really be Colonists, this artifact a fragment from the magical past?

He wanted to believe. He was tired — so tired — of pain, of death, of scraping his marginal existence from the unforgiving Air. To discover a Colonist artifact would be like returning to the arms of long-dead parents.

Glancing across at Philas, he recognized the same hunger to believe — to find a home — in her expression, the set of her body as she Waved.

With perhaps five hundred mansheights separating them from the artifact, two people broke from the grouping around the tetrahedron. The two came Waving cautiously up to meet Philas and Mur.

Mur slowed, and moved closer to Philas.

The pair from the tetrahedron halted a dozen mansheights below the Human Beings. They were a man and a woman, and they carried spears of wood. The woman came up a little further, and pointed her spear at Mur’s belly. “What do you want?”

Mur inspected the woman. She must have been aged around forty. The spear was well crafted, but it was just a spear — nothing more sophisticated than a sharpened stick of wood, nothing the Human Beings couldn’t have manufactured for themselves. The woman wore a crude, pocketed poncho of what looked like pig-leather, and a wide-brimmed hat. Folds of cloth were tied up around the rim of the hat. The woman was well muscled but scrawny; her face was wide and flat, disfigured by a scowl. “Well?” she demanded. “Deaf, are you?”

Mur sighed, disappointment gathering in him. He turned to Philas. “Obviously, these aren’t Colonists.”

“Who are they, then?”

“How should I know?” he snapped back, irritated.

He moved forward a little, with arms spread wide, hands empty. “My name is Mur. This is Philas. We’re — refugees.” He decided not to mention the rest of the Human Beings. “We lost all we possessed in the Glitch. We’re trying to get to Parz City. Do you know it?”

The woman’s eyes narrowed; she didn’t reply. She raised the spear uncertainly and poked it toward Mur’s stomach again, substituting aggressiveness for an answer.

“We’re wasting our time,” Mur whispered to Philas. But Philas had broken away from him and was Waving down with irregular, trembling strokes of her thin legs toward the strangers.

“You have an Interface,” she said.

The man, similarly grimy and scowling, a little younger than the woman, joined his companion. He too was wearing a battered, wide-brimmed hat. They stared at the Human Beings as suspiciously, thought Mur, as a pair of tethered Air-pigs.

“Please,” Philas said. “We’ve come a long way. We’re trying to reach the Pole. Can we…” She stumbled over her words, as if she’d become suddenly aware of how foolish they sounded. “Will your Interface help us?” She looked from one to the other. “Do you understand what I’m asking?”

The man opened a mouth devoid of teeth and laughed, but the woman laid a restraining hand on his arm. Her voice remained stern, but it softened a little. “Yes, I understand. And you’re right; it is an Interface — from the olden days, from before the Core Wars. But you can’t use it.”

Philas was trembling. “We’ll pay,” she said wildly. “You must…”

Mur grabbed her shoulders and tried to still her shivering with his own inertia. “Stop it, Philas. Don’t you understand? Even if we could pay, the Interface doesn’t work any more. These people are as helpless as we are.”

Philas stared into his face resentfully, then turned away; her body was wracked by shuddering.

The man and woman watched them curiously.

Mur turned to them wearily. “Why don’t you put away your weapons? You can see we’re no threat to you.”

They lowered their spears carefully, but kept them aimed roughly in the direction of the Human Beings. The man said, “You really are refugees from further upflux?”

“Yes. And we really are trying to reach a place called Parz City, which we’ve never seen. But it’s at the Pole.”

“Which Pole?” the woman asked. “The South Pole?”

The man cackled. “If you’re starting from here it hardly matters, does it?”

“Oh, shut up, Borz,” the woman said.

Mur put his arm around Philas. “Will you let us see your Interface?”

To his shame, he read amused pity in the woman’s expression. “If you want,” she said. “But stay close to the two of us. Do you understand? We see enough thieves and beggars…”

“We’re no beggars,” Philas said with a spark of spirit. She drew away from Mur and pulled her shoulders straight.

“Come, then.”

Borz and the woman turned away from them and separated by a couple of mansheights. Hand in hand, Mur and Philas Waved cautiously forward.

Soon they were approaching the artifact, shepherded by spears and scowls.

Mur squeezed Philas’s hand. “You should have said we weren’t thieves,” he whispered. “I was thinking of trying a little begging.”

She managed a small laugh. “It wouldn’t have worked. These people have no more than we have… or had, before we lost our home.” She pointed at Borz, to their left. “Look at the hat he’s wearing.”