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The hedge was long (20 miles?). A vast ammount of stone or brick would be neded to replace it with a wall.
While I accept Lalwende's explanation as highly likely, perhaps another reason lies in the Hobbits' persistance in living in artificial caves long after they had migrated from real caves of the mountains; there was a shortage of good building stone in The Shire.
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Last edited by Selmo; 09-07-2006 at 02:50 AM.
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