When Melissa Clark purchased a box of old scrapbooks online, she knew only that she had bought something relating to the University of Utah and Zion Park. What came in the mail was much more than she had expected. Instead of random mementos, two albums arrived full of photographs and newspaper clippings dating to 1920 that document a trip made by six young women from the University of Utah into the newly formed Zion National Park. Part of a promotional campaign developed by the Los Angeles and Salt Lake Railroad to advertise its national park shuttle service, the women entered Zion Canyon...