The following day, someone on the roof of an adjoining building was heard whistling and calling.

The voices of several aviators could be heard calling to one another.

He could often be heard calling into the station, even as recently as last week.

"Only that I was heard calling her a snob; and so she is."

They can often be heard calling to one another just after dusk or at sunset.

As it happened he had just heard from the Brackhampton people calling us in.

As the water began rising, the prisoners on the ground level could be heard calling for help.

He could often be heard calling for Graham to throw him the ball while running routes.

But in the course of an hour or two, a few birds could be heard calling.

Then the voice of an officer was heard calling: "Line!