Book excerpt: A collection of entertaining accounts of travel through Yellowstone from 1871, before it was a tourist destination, until 1916, when autos were allowed into the park. The adventurers include an intrepid mother who posted the sign "Park or Bust" on her family's covered wagon, a strong cyclist and hikers who traversed the whole park for fun, and an expert guide on skis. These travelers experience the geysers without boardwalks, bushwhack trails before maps, handle horses, and encounter bears. Featuring a color gallery of 26 watercolor paintings from 1884 by Thomas Henry Thomas, shown for the first time outside Wales.