Fourth Draft of "The West." n.d.

Marla, Modern Art Museum of Fort Worth, Fort Worth, Texas, to Stuart Gentling. 1995.

Second Draft of "The West." n.d.

"Wilderness: America's Living Heritage" edited by David Brower. n.d.

Draft of "Epilogue - The Grand Canyon Today." n.d.

Draft of "Epilogue - The Grand Canyon Today." n.d.

Third Draft of "The West." n.d.

"The Inverted Mountains: Canyons of the West" edited by Roderick Peattie. n.d.

Second Draft of "The West." n.d.

Clipping, “Army and Navy Contains Many Film Men,” The Moving Picture World. August 24, 1918.