He was looking down at her with an unreadable expression.

Sometimes, she found him looking at her with an unreadable expression in his dark eyes.

She was staring at him, an unreadable expression in her eyes.

An unreadable expression crossed his face and he turned away.

She looked at him with an unreadable expression and shrugged.

She looked at him with an unreadable expression, started to speak, then became silent.

He didn't say anything for a long time, just watched her with a, completely unreadable expression on his face.

And all the while she was watching him, a strange, unreadable expression in her dark, beautiful eyes.

He was smiling at her, an unreadable expression in his eyes.

He turned off onto a back road, driving away from the lake, an unreadable expression on his face.