The Star was spawned in a galaxy, a disc of a hundred billion stars. It was actually ancient, the cooling remnant of an immense explosion which had driven away much of a massive star's bulk and devastated the gray companion which still accompanied it. As time wore on the Star had drawn material from the companion, knitted gas into planets.

Then the Ur-humans came.

They downloaded the Colonists — images of themselves — into the Core; and the Colonists built the first Star-humans.

For five centuries the Colonists and the Star-humans worked together. Huge engines — discontinuity drives, Karen called them — were built at the North Pole of the Star. Teams of Star-humans wielded mighty devices under the instruction of the Colonists.

Hork's eyes narrowed. "Ah," he breathed. "So they do need us, these Colonists. We are the hands, the strong arms which built the world..."

The discontinuity drive engines hurled the Star from its birthplace. It soared out of its galaxy and sailed free across space.

The Ring was close to the Star's native galaxy — so close that light would take no more than ten thousand years to cross the void to the Ring, Karen Macrae said; so close that the immense mass of the Ring was already distorting the galaxy's structure, pulling it apart. The Star — with its companion, its planets and gas ring, and its precious freight of life — fell across space toward the Ring, glowing in the darkness like a wood-burning torch.

A century passed inside the Star. Thousands of years fluttered by in the universe outside the Crust. (Dura could make nothing of this.)

The Ring neared.

The Colonists grew afraid. The Star-humans grew afraid.

"Why?" Dura demanded. "Why should they fear the Ring? What will happen when we reach it?"

The Colonists retreated into the Core. They had constructed a wonderful virtual world for themselves in there — unreal Earths... And they believed they would be safe there, that they could ride out any disaster which might befall the Star.

The Star-humans were left bereft in the Mantle like abandoned children. They had their wormholes and other gadgets, but without the guidance of the parent-Colonists the devices were like so many gaudy toys.

Resentment grew, displacing fear. The Star-humans determined that they would follow the Colonists into their Core haven if they could — or if not, they would make the complacent Colonists as fearful as themselves.

Wormhole Interfaces were ripped from their anchor-sites in the Mantle and hurled downward into the Core. Armies, grim-faced, lanced through the wormholes in improvised ships. The technologies which had once built the discontinuity drives were pirated to craft immense weapons.

"The Core Wars," Hork said slowly. "Then they really happened."

Hork's anger was intense; it was as if, Dura thought, the huge injustice of abandonment had occurred only yesterday, not generations before.

The Colonists, insubstantial Core-ghosts as they were, had nevertheless retained immense material power. The War was brief.