Then he knelt down by the boy, his expression very gentle.

She has a gentle expression combined with a habitual serious appearance.

Her face had a gentle expression but she looked tired.

As he does so he keeps looking at her with a gentle expression.

And just looked at her with that gentle, too-wise expression of his.

He had a quiet, almost gentle expression on his gaunt face.

Linda Fox walked rapidly, with small steps, a gentle expression on her face.

It was an almost gentle expression, and the prince shook his head.

He looked her steadily in the face, and his features suddenly assumed a gentler expression.

She studied him for several moments, her expression gentle, almost a smile.