“And under that bridge sits a troll and demands every passerby pays him. Those who refuse have a leg injured, sometimes both. So I go to the alderman: “How much will you give me for that troll?” He’s amazed. “What are you talking about?” he asks, “Who will repair the bridge if the troll’s not there? He repairs it regularly with the sweat of his brow, solid work, first rate. It’s cheaper to pay his toll.”