1857, March 7 Dred Scott decision by the Supreme Court holds that Congress cannot bar slavery from territories, nor can slaves be citizens.

MISSOURI - Oregon County

Pigman Mound Archeological Site ** (added 1971 - Site - #71000472) Also known as Missouri Archaeological Survey Number 23OR21 Address Restricted, Riverton Historic Significance: Information Potential Area of Significance: Prehistoric Cultural Affiliation: Mississipian Period Period of Significance: 499-0 BC, 499-0 AD Owner: Private Historic Function: Funerary Historic Sub-function: Graves/Burials Current Function: Agriculture/Subsistence

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