A Bill Supplemental to "An Act to Erect Certain Bridges," Approved January 22, 1831, [13 February 1837]1
An act supplemental to an act entitled "an act to erect certain bridges" approved Jan, 22. 1831
Be it enacted by the People of the State of Illinois represented in the General Assembly: That the county of Knox2 shall be entitled to all the benefits of the act to which this is supplemental; Provided the county commissioner's court of said county, shall comply with the requisites of said act, within two years from the passage of this act.3

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A. bill for an act supplemental to an act entitled "An act to erect certain bridges" approved Jan. 22— 1831
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1Abraham Lincoln wrote the text of this bill as well as its title on the back page.
On February 13, 1837, William McMurtry from the Committee on the Militia introduced in the House of Representatives HB 281, which was written by Abraham Lincoln. On February 20, the House passed the bill without amendment, and referred it to the Senate. On March 2, following the addition of amendments by a select committee, the Senate passed the amended bill. That same day, the House concurred in the Senate amendments. The Council of Revision then approved the bill, and the act became law.
Illinois House Journal. 1836. 10th G. A., 1st sess., 580, 651, 804, 808, 837, 846; Illinois Senate Journal. 1836. 10th G. A., 1st sess., 471, 533, 559, 582, 595, 626.
2The final bill as passed included McDonough County as well.
3The 1831 Act appropriated $200 to Knox County for a bridge across Spoon River and $150 to McDonough County for a bridge across Crooked Creek. The Act stipulated that the county commissioners courts were to choose the bridge sites and control construction. Upon completion of the bridges, each county’s commissioners court was required to certify as such to the Auditor of Public Accounts, who at that point would release to them the the amounts appropriated to their counties.
“An Act to Erect Certain Bridges,” 22 January 1831, Laws of Illinois (1831), 37-38.

Handwritten Document, 2 page(s), Lincoln Collection, HB 281, GA Session: 10-1, Illinois State Archives (Springfield, IL)