His face wore the mild, vacant expression of a man walking in his sleep.

Glenn turned to see Foley, still with a mild expression, almost smiling.

It didn't seem to be penetrating Robert's mild expression of good cheer anyway.

Instead, he kept the mild expression on his face.

She had a mild, vague expression which didn't suit her.

"I know the money will come in time," said Ledee, resigned to his mild expression of protest.

He looked at Chris then with a mild expression and said it again.

His bony face bore a milder expression than she had expected.

They had a mild, friendly expression that won Beatrice's confidence.

The mildest expression is a slight flick of the head to the side and back.