You have insisted on my entertaining you to an exceedingly expensive, not to say ostentatious, lunch, though I was obliged to pawn my watch and chain in order to do so (and let me tell you, Ma’am, that none of our family have been in the habit of frequenting pawnshops, except my cousin Edward, and he was in the Yeomanry).
There are no more uses of "obliged" in the book.
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He obliged her by listening attentively.
They looked at me expectantly and I was obliged to comment.