Moody Bible Institute's Today in the Word, September, 1991, p. 27
Circus showman P.T. Barnum once ran an animal museum in lower Manhattan. People enjoyed the exhibit so much they would stay for hours, preventing others from entering. Finally, Barnum devised a way to rid the place of customers who overstayed their welcome. Over the cage of a tigress and her cubs he hung a large sign which read, "Tigress." Over a doorway next to the cage he hung another sign: "To the Egress." Thinking they would see another curiosity, people walked through the door and out onto the street!