What Brother Onion Made From Showing The Charcoal To The Crowd

This 14th century story in the Italian city of Certaldo was written by Giovanni Boccaccio as part of the Decamaron,  a frame story containing 100 tales told by a group of seven young women and three young men sheltering in a secluded villa just outside Florence to escape the Black Death, which was afflicting the city.  This story is about Brother Onion, who is a short, redhead, and happy preacher, and whose friends are unhappy with his false prophecies.