This article is from the Ghost Stories FAQ, by obiwan obiwan@best.com with numerous contributions by others.
A caul is a piece of the fetal membrane that covers the heads of
some babies when they are born. This occurrence is relatively rare,
and because of this folklore says that a baby born with a caul
possesses psychic powers. In the past, people would keep cauls and
placed great value upon them as good luck charms.
 
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