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February 09, 1839 -
COOK lost to creation of DU PAGE.
(Ill. Laws 1838-1839, pp. 73-74)
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January 16, 1836 -
February 09, 1839
COOK lost to creation of McHENRY.
(Ill. Laws 1835-1836, pp. 273-278)
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January 12, 1836 -
January 16, 1836
COOK lost to creation of WILL.
(Ill. Laws 1835-1836, pp. 262-263)
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January 15, 1831 -
January 12, 1836
COOK created from PUTNAM.
(Ill. Laws 1830-1831, pp. 54-57, 62-63)
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