Somebody made a wolf- whistle sound from one of the nearby buildings.

Vaguely, in the midst of his great excitement, he had heard a whistle sound as he dropped inside the wall.

The whistle sounds, punctually to the stroke of six; we are off.

At the same moment a shrill whistle sounded in the opposite direction.

The body drew in its breath with a whistling sound and moved.

Overhead a strange noise filled the air; a shrieking, whining, whistling sound.

Instantly the whistles sounded, and my hearties came bounding into the field.

A shrill whistle sounded among the shrubbery, and the speaker became mute.

Its whistle sounded, and soon it came winding through the sparse woodlands.

The whistle sounded,-onelong, wild scream,-andthe speed of the train slackened.

High and clear and shrill, a familiar whistle sounded back of them.

A whistle sounded down the line, a short nervous blast twice repeated.

While she wavered, a loud whistle sounded, and the train moved off.

A whistle sounded, two other waiters rushed out, and the battle began.

The theatre's curtain should go up when the whistle sounds, not before.

Then a whistle sounded and all the visitors filed through the portal.