This photograph shows the influential naturalist John Muir (right) and writer John Burroughs (left) at the Grand Canyon. It accompanied a 1911 essay in which Boroughs reflected, “The camera would have shown . . . only our silent, motionless forms as we stood transfixed by that first view of the stupendous spectacle. Words do not come readily to one’s lips, or gestures to one’s body, in the presence of such a scene.”