William Penn (of Pennnsyvania fame) had two aunts who owned a bakery in colonial 
Philadelphia. Their bakery was reknown for their mouth-watering pies and pasteries. 
They had a very sucessful business going, until a family of rats settled in their 
cellar. These rats ate their pies faster than they could bake them, and put the bakery 
out of business in less than a weeks time. You probably never heard of "Two Sisters 
Bakery". But everyone has heard of the "Pie Rats of Penn's Aunts"