The Leopold clan at their "shack" in Wisconsin. Many of the ideas for A Sand County Almanac, drawing, too, from Leopold's tenure with the U.S. Forest Service in the West, were galvanized here. Back row, left to right: Aldo Leopold, wife Estella and sons and Luna and Starker. In from, daughters Nina and Estella with family dog, Gus. Photo courtesy Aldo Leopold Foundation, (www.aldoleopold.org)