I don't know that tome. But I was thinking that literate hobbit families might well have the sort of books that some people get handed down from their foremothers - like practical commonplace books with herblore and recipes for dishes and simples. The sort of thing that would be passed down and maybe copied for a daughter getting married and gradually added to and amended.
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“But Finrod walks with Finarfin his father beneath the trees in Eldamar.”
Christopher Tolkien, Requiescat in pace
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