A smile that, I could see quite clearly, held no warmth or humor at all.

The concern was again in his face, but it had gone flat, like a smile held too long for the camera.

His sudden smile held a warmth that made her heart ache.

She smiled at me, but her smile held no humor, and was also unreadable.

And that little smile of his held a certain charm.

Her own small smile held the confidence of those with limited experience.

His smile was quick, but held a hint of a grin.

The smile was brief this time, and held no invitation.

Nothing big: nervous flicking of the eyes, the smile held too long.

He jerked the gun up, but his smile held.