1856-1920 1866-1955 1873-1933 1874-1922 20thcentury adventurers autobiography biography british descriptionandtravel discoveryandexploration endurance(ship) ernesthenry exploration explorers greatbritain henson history imperialtrans-antarcticexpedition(1914-1917) juvenileliterature k2(mountain) luigiamedeodi matthewalexander modern mountaineeringexpeditions pakistan peary polarregions savoia shackleton travel travelshackleton