Not until the next day were they identified as secret signals from Cuban insurgents.

Cranston was unable to tell whether a secret signal passed between them.

Sure, somebody had called, saying they were from the dentist, but this was a new secret signal.

That is probably a secret signal that everybody has gone to bed.

The beginning of my secret signals to the world.

"And you'll get to give me secret signals, too, just the way we talked about before."

The girl lowered her head as if to acknowledge some silent, secret signal passed between them.

He made a secret signal to them, and they recognized him as a friend.

He gives her a secret signal, after which she comes out of the kitchen door.

Tell them to admit him when he gives the secret signal.