They therefore all hurried along behind their new friend who led them at a surprisingly quick pace, and always in the thickest parts of the forest, for over an hour.
But they all knew that it was her spells which had produced the endless winter; and therefore they all knew when this magic spring began that something had gone wrong, and badly wrong, with the Witch’s schemes.
There are no more uses of "therefore" in the book.
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Kim is taller than Ashley. Ashley is taller than Anna. Therefore, Kim is taller than Anna.
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