Brett Breithaupt and Jack Deibert will discuss the highlights of their 2016 book “Tracks, Trails, and Thieves: The Adventures, Discoveries, and Historic Significance of Ferdinand V. Hayden’s 1868 Geological Survey of Wyoming and Territories.” Most of the expedition’s activities took place in southern Wyoming in conjunction with the building of the transcontinental railroad. The railroad’s construction activities caused Hayden to have serendipitous encounters with legendary army generals, politicians, businessmen, photographers,geologists, and thieves, many of whom significantly changed the course and scope of the survey.