|Abstract||Title continues, "David Thompson, Thomas Jefferson and the Corps of Discovery traveled similar paths throughout their careers." |
In 1797-1798, David Thompson, a fur trader and cartographer for the North West Company,"surveyed and mapped the North West Company's trade route from Lake Superior to Lake Winnipeg." During the process he discovered Turtle Lake, one of the sources of the Mississippi River, and "accurately determined the latitude and longitude of the Great Bend of the Missouri River near the Mandan villages." Lewis and Clark had a copy of this map on their journey. The article discusses David Thompson's explorations in the northwest.