The light would have revealed the presence of anyone if they were there.

If I can't control him he will reveal my presence here.

At that time I didn't want to reveal my presence here.

Suddenly the figure inside leaned forward just enough to reveal its presence.

Once it was spread, they couldn't move without revealing their presence.

Besides, by speaking out, they would only be revealing their presence.

But he could go out and at least listen to her sing without revealing his presence.

There was nothing to reveal the presence of the combatants.

He tried to do just that, but your prior order not to reveal our presence to anyone prevented him.

Not yet ready to reveal his presence, Doc looked about for a hiding place.