Jonathan Luther "Casey" Jones (March 14, 1863 - April 30, 1900) from Jackson, Tennessee, was an American railroader who worked for the Illinois Central Railroad (IC). He was killed on April 30, 1900, when his train collided with a stalled freight train near Vaughan, Mississippi. His dramatic death while trying to stop his train and save the lives of his passengers made him a hero; he was immortalized in a popular ballad sung by his friend Wallace Saunders, an African-American engine wiper for the IC. As a boy, he lived near Cayce, Kentucky, where he acquired the nickname of "Cayce", which he chose to spell as "Casey".

During the World's Columbian Exposition at Chicago, Illinois, in 1893, IC was charged with providing commuter service for the thousands of visitors to the fairground. A call was sent out for trainmen who wanted to work there. Jones answered it, spending a pleasant summer there with his wife. He shuttled many people from Van Buren Street to Jackson Park during the exposition. It was his first experience as an engineer in passenger service and he liked it.  At the fair (also called The Chicago World's Fair), he became acquainted with No. 638, a big new freight engine IC had on display as the latest and greatest technological advancement in trains. It had eight drive wheels and two pilot wheels, a 2-8-0 "Consolidation" type. At the closing of the fair, No. 638 was due to be sent to Water Valley for service in the Jackson District. Jones asked for permission to drive the engine back to Water Valley. His request was approved, and No. 638 ran its first 589 miles (948 km) with Jones at the throttle to Water Valley. Jones liked No. 638 and liked working in the Jackson District because his family was there. They had once moved to Water Valley, but returned to Jackson, which they felt was home.  Jones drove the engine until he transferred to Memphis in February 1900. No. 638 stayed in Water Valley. That year he drove the engine that became most closely associated with him, for one time. That was Engine No. 382, known affectionately as "Ole 382.", or "Cannonball". It was a steam-driven Rogers 4-6-0 "Ten Wheeler" with six drivers, each approximately six feet (1.8 m) high. Bought new in 1898 from the Rogers Locomotive Works, it was a very powerful engine for the time. When a potential disaster arose, all of Jones' skill and the engine's responsiveness were put to the greatest test.  His regular fireman on No. 638 was his close friend, John Wesley McKinnie, with whom he worked exclusively from about 1897 until he went to the passenger run out of Memphis. There he worked with his next and last fireman, Simeon T. "Sim" Webb in 1900.

Answer the following question by taking a quote from the article: What was Casey's service at the Exposition?