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  1. Mahatma Gandhi, traveling to the 1931 Round Table Conference in London
  2. Portrait of naturalist and geologist Charles Darwin
  3. Protozoa, historical artwork
  4. Alcatraz Island and the San Francisco Bay and skyline of San Francisco, California, USA
  5. Samuel Langhorne Clemens, 1835
  6. American history painting of President William Henry Harrison
  7. Chief Joseph Brant
  8. Ortelius's map of Austria, 1570
  9. Madonna of the Prairie
  10. General Philip Kearny's fatal charge at the Battle of Chantilly
  11. Library Of Congress Reading Room
  12. On his rocker, instead of off, is Groucho Marx posing as Whistler's Mother
  13. Paul Charles Morphy (1837-84) engraved by D.J. Pound from a photograph
  14. Obama And Mandela, 2011
  15. Total solar eclipse, 1878
  16. Civil War Poster Seeking Vermont 9Th Infantry Recruits
  17. Sailors on deck of USS Mendota gun boat during American Civil War
  18. Study for 'Light Battery at Gettysburg'
  19. Moon Walk
  20. The Wonderful Story of Britain: The Boston Tea-Party
  21. The Army that Fought at Sea
  22. Moses and the Burning Bush
  23. You Can Help, American Red Cross, 1918
  24. Graham Hill, waves as his car streaks toward the finish line to win the Indianapolis 500
  25. Maat, goddess of wisdom, justice and truth, Egypt, Luxor Temple
  26. Discovery Hind Leg Of The Dinosaur Diplodocus, By Henry Fairfield Osborn In 1898
  27. Knocking-off time at the Harland
  28. German WWII ramjet bomber blueprint
  29. Taverns And Wagons In Western American Town
  30. Morse code apparatus, historical artwork
  31. The History of Our Wonderful World: The Vikings
  32. Sunwatch Indian
  33. First Atom Bomb Test Site
  34. Vintage World War II artwork of President Franklin Delano Roosevelt
  35. Laocoon group, Vatican Museums
  36. Relief depicting a pharaoh making an offering, Temple of Luxor, Egypt
  37. Camel riders at Giza Pyramids, Giza, Cairo, Egypt, Africa
  38. View Of Danzig, Poland From River, 1939
  39. Roy Campanella, catcher for the Brooklyn Dodgers, holding six bats, June 4, 1953
  40. Distillation, 16th century woodcut
  41. Napoleonic Wars, Portrait of Haiti's leader, Toussaint L'ouverture, By Louis Bombled
  42. Beatus of Girona. 976. Sheet 6, depiction of Saint John the Evangelist
  43. Check Up
  44. Indian Motor Cycle Ambulance
  45. President John F. Kennedy signing the Equal Pay Act
  46. World War II War Bonds poster, 1943
  47. 'Ar never gets off'
  48. Title Page From The Luther Bible, C.1530