For a long time the people of St. Louis had been preparing for a grand fair, to be known as the Louisiana Purchase Exposition, to commemorate the purchasing from France of all that vast territory of the United States which lies between the Mississippi River and the Rocky Mountains and the Gulf of Mexico and British America. The purchase was made in 1803 for fifteen millions of dollars, and it was hoped to hold the exposition on the one hundredth anniversary, in 1903, but matters were delayed, and so the fair was postponed until 1904.