While Henry David Thoreau's travels to the Maine Woods and Cape Cod were well documented and have been followed by "Thoreauvians" for decades, his 1861 "journey west" with Horace Mann, Jr.--which took the duo from Massachusetts to Minnesota and back--was left to be veiled in mystery. This book details this, the last, longest, and least-known of Thoreau's excursions. The story of two 19th-century men and the 21st-century woman who was determined to follow their 4,000-mile path, this account will intrigue history buffs as they follow in the footsteps of a popular American writer and naturalist.