They waited patiently as a vast structure formed around them.

He pointed to the near side of the vast structure.

There was a trembling throughout the whole of the vast structure.

The dark lines of the vast structure sent a chill through him.

And the vast structure was being evacuatedthough not according to any organized plan.

The vast structure had no mechanism to recover from such a wound.

One vast structure had a floor that alone required five train cars' worth of nails.

Nowhere on all that vast and tangled structure was a human shape visible.

A vast, immeasurable, structure lies in the dead of space.

There should be plenty of hiding places in such a vast structure.