She could see by her captain's expression that this was not the right thing to have done.

I could see by Brian's expression that he didn't want to go, either.

I could see by her expression that she did not know.

She saw by my expression that the answer was no.

I can see by your expression that you are not satisfied.

She could see by his expression that it worked, but not particularly well.

She saw by his expression that it did matter to him.

No, I can see by your expression that you didn't.

He started to answer then saw by her expression that no explanation was needed.

Tom saw by his expression what he was thinking, and gave him no argument.