He was surprised at my black robe, I believe, but he showed it only by a slight widening of his eyes.

Although there had been that slight widening of the eyes.

Hergrom's only reaction was a slight widening of his eyes.

By the slight widening of his eyes, Vorreedi caught the joke.

Locke suppressed a smile at the slight widening of the steward's eyes.

Understanding came with a slight widening of his eyes.

Suddenly there was a slight, discernible widening of the eyes and the intense expression turned to anger.

If Ben displayed any surprise at all, it could be detected only in a slight widening of his eyes.

The only sign of surprise the woman gave was a slight widening of her eyes.