He needn't have wondered; the grim set to her mouth told him she'd seen a couple of corpses, too.

Now that I looked at him properly, he was rather white in the face, with a grim set to his lips.

They walked toward Hari, a grim set to their jaws.

He looked at the face again, the grim set of the mouth with its firm chin.

There was a grim set to his face; he did not like to be trifled with.

He came in with such a grim set to his lips that they all looked at him apprehensively.

My mother opened the door for us with a grim set to her mouth.

They were smiling, but there was a grim set to their mouths.

The grim set of the human's jaw told her he wasn't happy with what he'd seen.

The grim set of his face seemed to have loosened the smallest bit.