Suddenly, high overhead, a boy stuck his head through a slit window.

Each cell has a slit window which is 5 inches wide by 7 feet long.

Also right at the top was a small slit window.

Flashes of light came through the high slit window.

The stairs led to a shallow landing, with a wide slit window to one side and a door to the other.

In the middle stage on the north, west and south sides is a slit window.

His eyes caught a movement at the slit window in the wall.

A prismatic slit window high in the wall above provided the plants with sufficient light for growth.

In the north wall of the chancel is a slit window dating from the 12th century.

She pulled on the heavy metal door with its little slit window that led to the inside stairway.