Salisbury she had known to be her point on leaving Northanger; but after the first stage she had been indebted to the post-masters for the names of the places which were then to conduct her to it; so great had been her ignorance of her route.
There are no more uses of "indebted" in the book.
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I am indebted to you for your hospitality.
I am indebted to researchers who laid the foundation for my work.