Finally, with typical incomprehensibility, the hydrogues separated and streaked off at high speed, as if responding to some unheard signal.

And then, as if by some unheard signal, everyone stood and raised their hands above their shoulders.

Durkee remained in his prayerful pose until, at home unheard signal, he rose wearily to his feet, turned and faced the crowd.

The unheard signal drew them to the Gate like a scent, triggering the preprogrammed malevolence within them.

Then, on some unheard signal, the dolphin turned and jetted away.

The monsters filled the clearing, pressing slowly forward from every side until suddenly, at some unseen, unheard signal they all stopped.

As if triggered by an unheard signal, the eyes of Rolland and Wyatt-Turner lifted and met.

Once again at that unseen and unheard signal they gave vent to that emotionless howl.

After a few minutes of unbearable tension had gone by in nearly perfect silence, the columns suddenly, on the same unheard signal, erupted into the plaza.

Now at a signal unheard by all save him, he jumped out of the saddle and stood beside the stirrup leathers of the second charger.