The "Dinky" was the affectionate name given to Illinois Terminal Railroad Company railbuses that served the short line between Alton and Grafton, Illinois. Illinois Terminal was unusual in operating both steam and electric railroad lines under one corporate name, and its railbus service evolved from earlier steam-powered passenger trains on this scenic route. The line carried Powder Mill workers from Grafton and students attending Principia College in Elsah. The railbus was a city bus converted for rail service and used in place of steam engines. The name "Dinky" may have reflected railroad terminology for small, toy-like trains and cars, and the route's short length may also have contributed. The first Dinky was City Bus #204, converted in 1933 for passenger service between Alton and Grafton by replacing its front wheels with a pony truck and mounting flange wheels in the rear. This 29-passenger coach carried baggage, mail, and passengers, and its return trip used a turn-table. Dinky #204 was retired on June 30, 1940, and scrapped. The second Dinky, #205, was a 30-passenger railbus that served as a backup for #204. The third and final Dinky, #206, was a 29-passenger school bus that operated from November 16, 1939, until May 24, 1953, with stops at Alton, Clifton Terrace, Elsah, Chautauqua, and Grafton. Tickets cost 35 cents. Instead of being scrapped, #206 was sent in 1954 to the National Museum of Transport in St. Louis, Missouri, where it was completely restored and remains on permanent exhibit.