Captions, from top, then clockwise from top left: John Charles Frémont and John James Abert, Map of an exploring expedition to the Rocky Mountains in the year 1842 and to Oregon & North California in the Years 1843-44, Library of Congress, loc.gov; Francis Nicholson, Map of the several nations of Indians to the Northwest of South Carolina, 1724, Library of Congress, loc.gov; "Only one pickup works like a truck rides like a car," J. Walter Thompson Company, 1970, J. Walter Thompson Ford Motor Co. Advertisements, 1944-2001, Duke University, https://repository.duke.edu/dc/jwtfordmotorads; People Walking in Harlem, New York City, 1942, National Archives, archives.gov; Arthur Rothstein, Rehabilitation Client Repays Loan, Smithfield, North Carolina, 1936, Library of Congress, loc.gov; Paul Conklin, Volunteer Ida Shoatz, 23, of Philadelphia, runs a school lunch program in 13 villages in the Peruvian Andes, John F. Kennedy Presidential Library and Museum, jfklibrary.org/; Geraldine Portica--This Is Not a Girl, But a Boy, UC Berkeley, Bancroft Library, http://bancroft.berkeley.edu/; Taking it easy during a lull, 20th KS, Library of Congress, loc.gov; Grateful Dead, Grateful Dead, October 24, 1971, Warner Bros.; "The Graduating Class at Carlisle Indian Industrial School," New-York Tribune, March 21, 1906, Library of Congress, loc.gov; C. Don Powell, Grand Canyon National Park, a Free Government Service, 1938, Library of Congress, loc.gov; G. E. Blake, Tippecanoe and Tyler too! A Comic Glee, 1840, Notated Music, Library of Congress, loc.gov; Log drive on Clearwater River, Idaho, 1961, Photograph Collection, Forest History Society, https://foresthistory.org/; Harris & Ewing, Party Watchfires Burn Outside White House, Jan. 1919, Library of Congress, loc.gov; Jeff Devine, Peace, Buttons, Kaluhiokalani, Velzyland, 1974, https://jeffdivinesurf.com/; The Constitution of the United States, National Archives, archives.gov.
