Like Patagonia, 'the Fens' has no precise border. This bountiful wetland on the English east coast is a region that most maps cover with a blank. In a masterful and painstaking act of retrieval, James Boyce reclaims the landscape of his fiercely independent forebears. The Fennish, like most indigenous people, left few written records - an absence that makes Imperial Mud even more valuable, as a celebration of their centuries-long resistance against drainage and enclosing landlords; and, above all, of their utterly passionate relationship with the 'common' marsh through which they defined their identity.