The village engineers discuss the possibility of a poisoned well. The eldest son of the carpenter tells them that his wife is the wife of the "dummy" in question. They decide to go to the well to see if the clue is real or not, but the boy can't speak properly, so they'll have to ask the villagers where he got the bowl of sand. The widow's husband made pottery, so it's not surprising that he'd use his legal name after he turned adult. The engineers decide to use their potion of honesty to find out more about the mystery.