13 of 13 Flora and Fauna: 1 | 2 | 3 | 4 | 5 Letters and Records: 1 | 2 Maps: 1 | 2 | 3 Native Americans: 1 | 2 | 3 MISSOURI HISTORICAL SOCIETY CLATSOP TRIBE Lewis and Clark encountered the Clatsop tribe on the south side of the Columbia River. Clark documented the "head-flattening" practiced by the tribe along with the resultant skull deformation in adults.

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