Note A — Front matter
Reading edition
Thompson’s estimate: Latitude, 43° 39’ 45” north. Longitude, 109° 43’ 17” west. Yount Peak, source of the Yellowstone (Hayden): Latitude, 43° 57’ north. Longitude, 109° 52’ west. Thompson’s error: In latitude, 17’ 15”. In longitude, 8’ 43”, or about 21 miles.