1819 Illinois County Formation Map
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1819--ALEXANDER, CLARK, JEFFERSON AND WAYNE
As counties of the State of Illinois
ALEXANDER. March 4--All that tract of country within the following boundaries, to-wit: West of the line between ranges one and two east of the third principal meridian and south of the line between townships thirteen and fourteen south of the base line to the boundaries of this State on the Ohio and Mississippi, shall constitute a county to be called ALEXANDER.
[Laws 1819, p. 113.]
CLARK. March 22--All that part of Crawford County lying north of a line beginning on the Great Wabash River dividing townships eight and nine north, running due west, shall form a new and separate county to be called CLARK.
[Laws 1819, p. 166.]
JEFFERSON. March 26--Beginning where the line between ranges four and five east intersects the base line; thence west with said line to the third principal meridian; thence south twenty-four miles; thence east twenty-four miles; thence north to the place of beginning, shall constitute a separate county to be called JEFFERSON.
[Laws 1819, p. 267.]
WAYNE. March 26--Beginning on the White County line on the dividing ranges nine and ten east of the third principal meridian; thence north to the line dividing townships three and four, to the Crawford County line, north of the base line; thence west to the line dividing ranges four and five east of the third principal meridian line; thence south to the White County line; thence east to the beginning, shall constitute a separate county to be called WAYNE.
[Laws 1819, p. 268.]