I bought an extremely fragile 1906 Railway Guide a couple of years ago in either Illinois or Indiana. Here are the Illinois Central and Y&MV pages from the 1906 Guide.
I hope you find them interesting.
Tom Parker
Page 1 - 1906 Map of Illinois Central and Connections
Page 2 - List of Officers and Offices
Page 3 - List of Officers and Offices (continued)
Page 4 - Listing of train consists
Page 5 - Listing of train consists (continued)
Page 6 - Schedules Chicago, Dubuque, Sioux City and Omaha
Page7 - Schedules Chicago, Albet Lea, Minneapolis-St Paul, Ft Dodge and Sioux City
Page 8 - Schedules Chicago, Springfield and St. Louis
Page 9 - Schedules Chicago, Cairo and New Orleans
Page 10 - Schedules Chicago, St. Louis, Memphis and New Orleans - Fulton to Grenada via Jackson Tn
Page 11 - Schedules Chicago, St. Louis, Memphis and New Orleans
Page 12 - Schedules Cairo-Johnston City, Cairo-Paducah, St Louis-Eldorado, Cherokee-Sioux Falls, Chicago-Evansville-Nashville
Page 13 - Schedules Peoria-Evansville-Nashville, St Louis-Carbondale, Blackford-Dixon, Carbondale District, Chicago-Bloomington-Minonk
Page 14 - Schedules Dubuque-Freeport-St Louis Centralia, Rantoul District, Champaign-Decatur-Havana, Uniontown Branch
Page 15 - Schedules Cincinnati-Louisville-New Orleans, Ownesboro-Horse Branch, Cecelia-Hodgenville, Aberdeen-Durant, Dyersburg Branch, Mound City Branch.
Page 16 - Y&MV Officers and Offices, Schedules Trail Lake-Leland-Rolling Fork, Helena-Eagle Nest, Woodville Branch, Jackson-Natchez, Ethel Branch, Lake Cormorant Branch, Roundaway Branch
Page 17 - Y&MV Schedules Memphis-Vicksburg-New Orleans, Clarksdale-Jackson, Riverside Line, Tutwiler-Belzoni-Yazoo City, Durant Branch