1817-1862 1831-1908 1839-1906 1842-1901 1843-1933 1909-1993 19thcentury 20thcentury 979 acton americanliterature artilleryoperations authors baron biography bishop bradley canyons carter cartography cartographyking cartographypowell cartographystegner cartographythoreau clarence confederate confederatestatesofamerica correspondence descriptionandtravel diaries discoveryandexploration english environmentalprotectioninliterature explorers francismarion georgey henrydavid historiographyacton history historyandcriticism johnemerichedwarddalbergacton johnwesley knowledge landscapesinliterature natureinliterature place(philosophy)inliterature powell soldiers surveying susanroy thomashenry thompson travelpowell travelsthompson unitedstates wallace wildernessareasinliterature