In the afternoon, while his crew set up camp for the night, Powell would often climb into the canyon to investigate. Much has been learned about the geology of the Grand Canyon and about the ...

Mathieu Brown (left), Kelly McGrath (center), and the author negotiate the Walter Powell Route to the South Rim. Since it entered the American consciousness, the Grand Canyon has provoked two ...

John Wesley Powell is born on March 24 in Mount Morris ... Confederate troops capture brother Walter in Atlanta on July 22. He escapes from a Confederate prison hospital, but is recaptured.