The Yukon rises in the Rocky Mountain range of British Columbia; entering Alaska at about 64° north latitude, and pursuing its course nearly from east to west across the entire Territory, it finally empties, as stated, into Behring Strait through Norton Sound. The river is navigable for fifteen to eighteen hundred miles, while its entire length is computed at over two thousand miles, with an average width of five miles for half the distance from its mouth. There are several places on the lower Yukon where one bank is invisible from the other. It is seventy-five miles across its five mouths and the intersecting deltas. At some places, six or seven hundred miles inland, the river expands to twenty miles in breadth, thus forming in the interior a series of connected lakes, which explorers pronounce to be deep and navigable in all parts. This great water-way can only be said to have been partially explored, but those persevering pioneers who have made the attempt to unravel its mysteries have given us extremely interesting details of their experiences, all uniting in bearing witness that its banks are rich in fur-bearing animals, and that its waters are stocked with an abundance of fish, including the all-pervading salmon. These valuable fishes follow the same instinct which they exhibit in other parts of the world, in their annual pilgrimage of reproduction, that is, after entering a river’s mouth, to advance as far as possible towards its source. Besides fish and fur-bearing animals, the region through which the Yukon flows contains abundant deposits of gold, silver, copper, nickel, and bituminous coal. Some placer gold mines which were worked on its banks and in its shallows, so long as the season permitted, are credibly reported to have yielded to one party of prospectors nearly eighty dollars per day to each man.