A Thousand-Mile Walk to the Gulf (Barnes & Noble Digital Library)

The title of this posthumously published 1916 volume says it all.  Editor William Frederic Bade uses Muir's journals to recount his 1867 walking tour from Indiana to the Gulf Coast just two years after the end of the Civil War.  An extraordinary adventure for a twenty-nine-year old budding naturalist, it marked the beginning of Muir's lifelong commitment to wilderness preservation.