Convergence: David Douglas, . . .

Jack Nisbetphiladelphia, 1823 and 1804coming to the northwest, 1825expanding the storylondon, 1828-29a new set of skillsthe geographer

Also by Jack Nisbet on Discovering Lewis & Clark:

David Thompson, Lewis & Clark, Thomas Jefferson

Photos in the V above, top to bottom, left to right:
Alexander Mackenzie, William Bartram, David Hosack, William Jackson Hooker,
Meriwether Lewis, Alexander von Humboldt, William Clark, David Douglas.