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March 24, 1868 -
OREGON exchanged with RIPLEY.
(Mo. Laws 1868, adj. sess., gen., pp. 16-23)
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March 12, 1859 -
March 24, 1868
OREGON lost to SHANNON.
(Mo. Laws 1858-1859, p. 413)
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March 02, 1857 -
March 12, 1859
OREGON lost to creation of HOWELL.
(Mo. Laws 1856-1857, gen., pp. 51-52)
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February 15, 1841 -
March 02, 1857
OREGON created from RIPLEY; OREGON not fully organized, attached to RIPLEY "for all civil and military purposes."
(Mo. Laws 1840-1841, pub., p. 43)
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