Beginnings at Harpswell, Maine -- Early Years on Mount Desert Island: The First Generation -- The Second Generation: MDIBL in the 1930s -- Wartime and the Early Postwar Years: Bust and Boom at the MDIBL -- MDIBL in the Postwar: The Third Generation -- Mid Century: The Third Generation Redux -- Year-Round Operation: The First Attempt -- Research in the Seventies: The Fourth Generation -- MDIBL in the 1980s: Doors Close, Doors Open -- Research in the 1980s: The Fifth Generation -- The Centennial Decade of the MDIBL -- Research in the 1990s: Molecular Biology Comes to the MDIBL -- The MDIBL in the Early 21st Century: A New Beginning -- Research in the Early 21st Century: The Year-Round Research Program Comes of Age.