In 1899, one of America’s wealthiest men assembled an interdisciplinary team of experts—many of whom would become legendary in their fields—to join him, entirely at his expense, on a voyage to the largely unknown territory of Alaska. The Harriman Expedition remains unparalleled in its conception and execution. This book follows the team closely: where they went, what they did, and what they learned—including finding early evidence of glacial retreat, assessing the nature and future of Alaska’s natural resources, making important scientific discoveries, and collecting an astonishing collection of specimens. A second thread involves the lives and accomplishments of the members of the party, weaving biographical strands into the narrative of the journey and the personal experiences they shared. This is the first comprehensive, scholarly treatment of the Harriman Alaska Expedition since the 1980s. It features the diaries, letters home, and post-Expedition writings, including unpublished autobiographies, generated by the members of the party.