In a vivid and revelatory journey through history, Proulx describes the fens of 16th-century England, Canada's Hudson Bay lowlands, Russia's Great Vasyugan Mire, and America's Okeefenokee National Wildlife Refuge. She introduces the early explorers who launched the destruction of the Amazon rainforest, and writes of the diseases spawned in the wetlands - the Ague, malaria, Marsh Fever. -- Résumé de l'éditeur.