 According to an article in the "Indianapolis Star", a fire started in a simulated opium den in the Mystic Cave on the evening of June 26, 1908.The fire spread over virtually the entire White City grounds, sparing only the swimming pool area; the pool was scheduled to have its grand opening the next day, June 27.An investigation revealed that the source of the ignition was a burning joss stick no wider than the head of a pin.