And as for my exact knowledge of the bones of the leviathan in their gigantic, full grown development, for that rare knowledge I am indebted to my late royal friend Tranquo, king of Tranque, one of the Arsacides.
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.