This is a beautiful sheet of 9, issued in 2010, honoring great explorers, including Scottish Congregationalist pioneer medical missionary & Africa explorer David Livingstone, French Navy officer & explorer Jean-Francois de Galaup, Norwegian Antarctic explorer Roald Amundsen, Royal Navy Officer from the Discovery Expedition Captain Robert Falcon Scott, Anglo-Irish explorer from the Heroic Age of Antarctic Exploration Sir Ernest Henry Shackleton, English explorer & naturalist William John Burchell, American North Pole explorer Robert Peary, Nobel Prize-winning Norwegian explorer & scientist Fridtjof Nansen, and Russian anthropologist & ethnologist Nicholas Miklouho-Maclay. The sheet is fresh, mint never hinged, and F/VF.