Bierstandt, Albert: p. 45
Creative Commons: pp. 15, 30, 36–37, 42–43, 50, 58–59
Dover: pp. 38,
Hmaag, Creative Commons: p. 52
Idaho Fish and Game: p. 29
Independence National Historical Park: p. 26
Library and Archives of Canada: pp. 30–31
Library of Congress: pp. 25–26, 30–31, 44, 51, 55, 58
Moran, Thomas; Creative Commons: p. 16
National Archives: p. 51
National Resources Conservation Service: p. 25
Remington, Frederic: pp. 14–15, 17, 22, 25, 54
Texas State Library and Archives Commission: p. 23
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