"Alexander Mackenzie, from Canada by land, 22 July 1793. Latitude 52 20 48 N."I was hoping to use the image from Charlie Farquharson's Histr'y of Canada, which riffs on CW Jeffreys's sketch of Mackenzie at Bella Coola, with Charlie adding "Wouldn't a Dow go great now?" on the rock. But I could not find either the Jeffreys image or the Don Harron version online. Everything digital all the time still has a ways to go....
