ANSWERS

1. The Penny Black. The postal reformer was Rowland Hill.

2. The Hindenburg. The reporter, Herbert Morrison, cried "Oh, the humanity!"

3. Roger Bannister, at Iffley Road, in 3 minutes 59.4 seconds

4. Queen Elizabeth II and President François Mitterrand

5. The Exposition Universelle. The tower was the Eiffel Tower.

6. Edward VII. He was succeeded by George V.

7. The Swiss Guard. New recruits are sworn in every 6 May.

8. Gordon Brown

9. Charles III and Queen Camilla

10. D The Czech Republic

11. Maximilien Robespierre

12. Robert Peary

13. Rudolph Valentino

14. Orson Welles, "The War of the Worlds"

15. George Clooney

16. Tony Blair

17. Gaston Leroux, "The Phantom of the Opera"

18. Henry David Thoreau

19. Alexander von Humboldt

20. Marlene Dietrich