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June 07, 1841 -
CLAY lost to creation of RICHLAND.
(Ill. Laws 1840-1841, pp. 77-79)
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February 15, 1831 -
June 07, 1841
CLAY lost to creation of JASPER.
(Ill. Laws 1830-1831, pp. 50-52)
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December 23, 1824 -
February 15, 1831
CLAY created from CRAWFORD, FAYETTE, LAWRENCE, and WAYNE.
(Ill. Laws 1824-1825, pp. 18-20)
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