Marion, IL depot. Chicago and eastern Illinois C&EI) Railroad (Frisco System) 1906 Sanborn map. See history below on the line. http://en.wikipedia.org/wiki/Chicago...inois_Railroad And a book on the Chicago and Eastern Illinois (C&EI) Railroad you can read on line. http://books.google.com/books?id=4ns...&cad=0#PPP1,M1