Gas clouds, dark and cooling, reached to the limits of this expanding Universe. There were no stars. There was no evidence of intelligence, or life.

The ratio of helium to hydrogen here was about twenty-five percent. This, and various other cosmological relics, told the Xeelee ship that this Universe had emerged from its singularity in a broadly similar fashion to that of the Universe of its origin, with comparable ratios between the fundamental forces.

This, of course, was good.

The semisentient ship was capable of independent speculation. Perhaps some property of the Ring had guided them to an inhabitable environment, the ship wondered.

It did not spend much processing time on such theorizing. After all, speculation was not its primary function; and even if it were, there was no one to report back to.

So the Universe was broadly similar to that once shared by humans and Xeelee. With one important difference.

It was much younger.

Less than a billion years had passed since the singularity here. No stars yet burned. There was virtually no iron, no carbon, no silicon -- no oxygen. Save for the helium and a few traces of more complex elements which had emerged from the singularity, there was only hydrogen. All the heavy elements would become abundant much later, when true stars began to shine and complex fusion processes in their cores got underway.

There were no Earths to land the humans on, no air for them to breathe, no metals for them to dig.

The ship unfurled its night-dark wings and dived into the hydrogen clouds. Cherry-red starbreaker beams blasted ahead of the ship; the gravity waves lanced through convection cells billions of miles wide, and a cylinder of roiling hydrogen-helium gathered. Within the cylinder temperatures rose by millions of degrees and complex fusion chains, comparable to those in the cores of the stars yet to form, were initiated.

A cascade of heavy elements emerged from the fires, and at last even a few atoms of iron were formed.

For three months the Xeelee ship patrolled the length of its creation; it passed its beautiful wings through the star-core cylinder, filtering out the heavy elements.

At last the Xeelee ship was ready to construct an Earth.

The heart of it was a core of iron seven thousand miles wide. Leaving the core at stellar-surface temperatures the ship now laid down a mantle of silicate rocks, constructed from the mineral banks it had built up, and overlaid the whole with a thin crust of oxygen and silicon. Next -- compressing billions of years of planetary evolution into weeks -- it deposited lodes of iron, bronze, tin, methane at suitably accessible points. There was even uranium. Then riverbeds, ocean floors, fjords were gouged out by the flickering of a cherry-red beam.

The process was creative; the ship almost enjoyed it.