Basement room of Boulder Dam Museum, showing a stairway and basement door in the southwest corner of the room.

Basement museum room, looking north, showing north corner of room. Boxes of materials are seen near the entrance doorway as light shines in from the windows.

'Johnson's California, with Utah, Nevada, Colorado, New Mexico, and Arizona, published by Johnson and Ward.' 'Entered according to Act of Congress in the Year 1864 by A.J. Johnson in the Clerks Office of the District Court of the United States for the southern district of New York.' Atlas page numbers in upper margin: 66-67. This is probably plate 67 from Johnson's New Illustrated Family Atlas, published in New York by Johnson & Ward in 1864. Shows natural features, locations of Indian tribes, proposed railroad routes, routes of explorers, trails, county boundaries and populated places ; "." ; Relief shown by hachures ; Prime meridians: Greenwich and Washington ; In top margin: 66-67 ; Hand colored ; On verso: Historical and statistical view of Mexico and central America (p. 79) and Historical and statistical view of the United States, 1860 (p. 78) Scale [ca. 1:3,484,800]. 1 in. to ca. 55 miles (W 124°--W 102°/N 42°--N 32°)

40 x 62 cm. Relief shown by hachures. Prime meridians: Greenwich and Washington. Page numbers at top: 58-59. "Entered according to act of Congress in the year 1864 by A. J. Johnson in the Clerk's Office of the District Court of the United States for the Southern District of New York." Original publisher: Johnson and Ward.