It was listed under the free United States (US & individual States) - Illinois Marriage, 1763-1900. I looked for Joseph Sewell and entered the date of marriage.
Joseph Sewell Marriage License Information
Groom Bride Date Vol./Page License No. County
| SEWELL, JOSEPH |  | SEELEY, ELIZA A |  | 01/25/1841 |  | 00A/0078 |  | 00000795 |  | TAZEWELL | 

 
 
The Illinois State Archives has an online database of marriage licenses. It looks like this information came from their data.
ReplyDeletehttp://www.ilsos.gov/GenealogyMWeb/marrsrch.html