There passed through Morris Townsend’s mind a rapid wonder as to what he might, even under a remote contingency, be indebted to from the action of this principle in Dr. Sloper’s breast, and the inquiry exhausted itself in his sense of the ludicrous.
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.