At ten o’clock to-morrow, Dr. Mortimer, I will be much obliged to you if you will call upon me here, and it will be of help to me in my plans for the future if you will bring Sir Henry Baskerville with you."
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.