From the folder entitled Random Things You Might Like To Know:
Exeter Cathedral’s Working Cat Uses the World’s Oldest Cat Flap
In medieval days, cathedrals would have been overrun with mice and rats without a feline prowling the premises. To keep vermin in check, the magnificent Exeter Cathedral—known formally as the Cathedral Church of Saint Peter in Exeter—has employed cats for centuries.
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J.R. Johnson 
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