All of the Tuesday Tales this month are from the Brothers Grimm. That was not intentional. I just looked at the list and saw it.
Today's Tale is The Blue Light. A soldier, recently discharged from the King's service, finds the home of a witch on his journey away from the castle. In return for a night of lodging, the soldier agrees to spade the witch's garden the next day. It takes him so long that he must stay another night. In return, he chops wood. This also takes so long that he is forced to spend a third night. In exchange, he agrees to climb into the well and get the witch's blue light. He figures out that he will be trapped once he hands it over to her so he keeps the light. The witch leaves him in the well anyways.