I heard the roughness in my voice; a sentimental old gray rat.

From out of the surrounding darkness grey rats had come silently.

Six gray rats were trying to bind him with grass ropes.

And that old grey rat tearing to get in.

Like a little grey rat, she thought, he would not let go.

A thin gray rat with a patch over one eye came running.

The show also included a grey male rat which he had bought from Harrods.

A huge gray rat scuttled across his line of vision.

"I was to say to you 'the gray rat has come out of the black maze and pressed the white lever.' "

Null opened the cage which lay close at hand, reached in and pulled out one of the large grey rats.