He gave her an almost imperceptible nod, and sat back in his chair.

He caught her glance and gave a slow, almost imperceptible nod.

He thought about that for a beat and gave an almost imperceptible nod.

Sam looked at Carol and saw the almost imperceptible nod.

She held the glance for a moment, and without expression, gave a single almost imperceptible nod.

David caught an almost imperceptible nod as Miles made his decision.

Branch allowed his head to move in an almost imperceptible nod.

Was it just her imagination that he gave an almost imperceptible nod?

She hesitated for a second and then gave an all but imperceptible nod.

He caught a small, almost imperceptible nod of approval from Brown.