"The same man," Langdon said, "who ordered the Knights Templar to recover the Sangreal documents from beneath Solomon’s Temple and thus provide the Merovingians proof of their hereditary ties to Jesus Christ."
There are no more uses of "hereditary" in the book.
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It is hereditary, but fortunately not contagious.
It is an unfortunate hereditary condition that is not easily detected even by the regular and thorough cardiac screening.