The Pacific Fur Company――Voyage of the _Tonquin_――Foundation of Astoria――Massacre on the _Tonquin_――Terrible Revenge――The great Small-pox Chief――Start of the Land Expedition――An Ambush――Unexpected Rescue――Treachery of an Interpreter――Among the Crow Indians――The Black Mountains――The invisible Lords of the Mountain――Arrival on the Banks of the Mad River ――Across Country to the Henry River――Construction of Canoes ――Embarkation on the Henry――A Canadian drowned――The Lion Caldron――Across Country again――Among the Akai-chies――News of the Astorians――Threatened Attack of the Natives――Arrival on the Banks of the Columbia――Along the River to Indian Encampment――News of Tragedy on the _Tonquin_――Down the Columbia to Astoria. CHAPTER XIII. Cass’s Voyage up the Mississippi――Long and James on the Platte, or Nebraska――Discovery of the two Sources of the Platte――Among the Mountain Passes――Eating of poisonous Berries――Meeting with a Bear――Ascent of Pike’s Peak――Search for Head-waters of the Arkansas――The Canadian taken for the Arkansas, and followed to its Junction with the latter River――Start of new Expedition from the Ohio――Cannibalism among the Natives――The Apostle of the Indians――Across the Prairies to Lake Michigan――Through Illinois to the Mississippi――Up the Mississippi to the Minnesota――The Head-waters of the Minnesota――The primal Home of the Red River of the North, the St. Lawrence, etc.――Up the Red River to Lake Winnipeg――From Lake Winnipeg to the Lake of the Woods, and thence across Country to Lake Superior ――Schoolcraft’s Ascent of the Mississippi, and Discovery of its actual Source. CHAPTER XIV.