CHAPTER XXX. Retrospect--United States Exploring Expedition to the South Sea--Humanity of an Indian--Trip to Detroit from the Icy Straits--Incidental action of the Massachusetts and Rhode Island Historical Societies, and of the Montreal Natural History Society--United States Exploring Expedition--Climatology--Lake vessels ill found--Poetic view of the Indian--United States Exploring Expedition--Theory of the interior world--Natural History--United States Exploring Expedition--History of early legislation in Michigan--Return to St.Mary's--Death of Governor De Witt Clinton..