But he squinted up at the sun with a speculative expression on his face anyway.

There was a speculative expression on his face, not quite a leer.

He turned round and found Twoflower looking at him with a speculative expression.

Quite a few times since, she'd noticed him watching her with a speculative expression.

Jim looked up at him, a speculative expression on his face.

Those dark eyes dwelling on him were full of a speculative expression.

She didn't like the speculative expression on his face.

"I do think we need to go back," the woman acolyte said, but she was staring at her with a speculative expression.

He looked at her for some time with a strange, almost speculative expression.

Then she looked at Nick with a speculative expression.