I had to give myself grey ones as it was.

Her dark, fathomless blue eyes met his cold grey ones.

Red trees died recently, and gray ones probably died several years ago.

After enough of that happened, "black" operations tended to become gray ones.

"I heard the gray ones threw him into the pit."

Perhaps his years of running among them would have kept him safe from being pulled down and eaten as the gray ones grew thin.

I opened my eyes, and his gray ones were so close to mine.

The other tunnel's safe enough, still secret from the gray ones by all the signs I could find.

Whether they be filled with gray ones or no, we cannot know.

So do the gray ones, but they made me sick sometimes.