Did you get this info from the online database of the Il Archives? Here is the link for how to obtain the orignal marriage records.

http://www.cyberdriveillinois.com/departments/archives/marrc...

Searching the database for marriages, it looks like both the marriage record and marriage application are available from IRAD in Springfield.

" If IRAD does have marriage records for the county you are searching and for the pertinent time period, write the appropriate IRAD depository and include in your letter all of the information on the marriage given in the Illinois Statewide Marriage Index.. Marriage record searches are free, but a small copy fee will be billed for records found."

Illinois Regional Archives Depository
LIB 144
University of Illinois at Springfield
One University Plaza, MS BRK 140
Springfield IL 62703-5407
Telephone: (217) 206-6520