Conservation & Environment
     
  Links to related primary sources from the Library of Congress  
     
     
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  Moran, Thomas. "Tower Falls and Sulphur Mountain, Yellowstone" c. 1875. The Evolution of the Conservation Movement, 1850-1920. Library of Congress American Memory Collection  
     
     
 
"Grosvenor, Gilbert H., Mrs." Between 1905 and 1945. Library of Congress Prints and Photographs Division.
 
     
     
 
Hunt, S. V. (Samuel Valentine). "Mirror Lake, Yosemite Valley." c 1872. Illus. in: Picturesque America / William Cullen Bryant. N.Y. : D. Appleton, 1874.
 
     
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