When Ken Burns and Dayton Duncan visited Yosemite National Park, they both called out Fredrick Law Olmsted as a major influence and inspiration for their documentary film, The National Parks: America's Best Idea. To celebrate Mr. Olmsted and his contributions to our National Parks, the Yosemite Conservancy, in partnership with Heyday Books, has reprinted "Yosemite and the Mariposa Grove: A Preliminary Report, 1865" with a new foreword by Dayton Duncan...