The Chicago and Eastern Illinois Railroad (reporting mark CEI) was a Class I railroad that linked Chicago to southern Illinois, St. Louis, and Evansville. Founded in 1877, it grew aggressively and stayed relatively strong throughout the Great Depression and two World Wars before being purchased by the Missouri Pacific Railroad (MP, or MoPac) and the Louisville and Nashville Railroad (L&N). MoPac merged the C&EI corporate entity in 1976 and was later acquired itself by the Union Pacific Railroad. From Wikipedia, the free encyclopedia. The logo is printed on 100% cotton gravel grey shirt.