And a call to one of them would not betray her presence.

Only the moving glow of a cigarette betrayed his presence.

Before she can speak with authority, and betray our presence.

Certainly he went past us all without betraying his presence.

He was no longer afraid of betraying his presence to enemies within.

Give a spy the opportunity and he would betray his presence.

Besides, it betrays my presence in this part of the world.

But whatever had been responsible for the sound was not in his path, nor did it betray its presence again.

It would betray his presence, if not immediately certainly within hours.

He knew several of them must be close, but they were being careful not to betray their presence.