"Or, better yet, I'll take a police whistle; that will summon help in no time."
This led to a lot of braking and other trouble, with a police whistle somewhere up the avenue.
In back of him, he heard a shrill police whistle.
To stop from falling backward, she grabbed his police whistle.
A police whistle from down the street had added to their apprehensions.
At the far end of the platform, I heard a police whistle.
She put a flashlight and police whistle into her pants pocket.
The force was unarmed with each man carrying only a walking stick and a police whistle.
Might as well carry a police whistle to let us know he's coming.
It was like a - like a police whistle gone mad or something.
The sounds of police whistles gave the answer.
Far down in the black street, police whistles were already shrilling.
Not police whistles or shouting in the street.
The two dropped to the fence and headed down an alleyway just as sounds of police whistles came to their ears.
They stopped promptly, when police whistles shrilled in the distance.
As the eerie tones died away in the night air, the sound of police whistles came from the street beyond the court.
He heard the piercing sounds of police whistles and pushed his way back through the crowd.
Above on the moor the police whistles were closer through the mist.
The shrill sound of police whistles warned Charlie that cops were approaching.
The police whistles seemed to have broken the trance that held them.
