Read it through once

She fixed her eyes on him, and there was something in their character that reminded him of large polished buttons--buttons that might have fixed the elastic loops of some tense receptacle: he seemed to see the reflection of surrounding objects on the pupil. The expression of a button is not usually deemed human, but there was something in Miss Stackpole’s gaze that made him, as a very modest man, feel vaguely embarrassed--less inviolate, more dishonoured, than he liked. This sensation, it must be added, after he had spent a day or two in her company, sensibly diminished, though it never wholly lapsed. “I don’t suppose that you’re going to undertake to persuade me that you’re an American,” she said.