An eloquent, practical and convincing plea to abandon the project of constructing the Echo Park Dam on the Utah-Colorado border for hydroelectric power, comes in the form of several articles by people in various occupations, all of whom have the common desire to preserve one of our few remaining wilderness areas for rest and recreation. In his own essay, Wallace Stegner points to the natural wonders of the district. It is full of wonderful scenery; it is a rich archeological site of Indian cultures and of the bones of prehistoric animals- all of which the proposed dam would destroy by gouging out and submerging the land around the Green and Yampa Rivers. Articles by Eliot Blackwelder on geology; by Olaus Murie and Joseph Penfold on animals; by Robert Lister on ancient Indian settlements, and others- give information of general as well as particular interest and are a powerful persuasion to leave the area unimpaired. An extensive photographic supplement shows many of its striking beauties.