Charles Floyd was the only member of Lewis and Clark's 1804 expedition to die in the field. Always fearful of losing and data or observations they collected, th

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By Terry Nathans he weather and climate of the trans-Mississippi west was virtually unknown at the begin- Tning of the nineteenth century. This changed dramatic

In 1804, Meriwether Lewis and William Clark set forth to explore and map the West, and forge a trade route to the Pacific coast. Though their adventures and con