The Dulwich Puzzler #2

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Across
  1. 4. First name of poet who wrote "The Raven"
  2. 6. Son of Homer Simpson
  3. 7. scientific name for the kneecap, beginning with "t"
  4. 10. Age where a person in the US and Australia can legally vote
  5. 11. Irritated
  6. 12. "An apple a day keeps the ... away"
  7. 14. Country that has the exact same name as a US state
  8. 15. Disney movie based in Italy
  9. 16. Name of a mathematical constant
  10. 17. Star sign with the shortest name
  11. 18. Official language of India
  12. 19. Asian country that only shares land borders with China, Cambodia and Laos
  13. 24. Asian peninsula
  14. 26. Name of book written by David Walliams, "Mr..."
  15. 27. What season is it now? (not the American way)
  16. 28. A large object orbiting a star. The Earth is one.
Down
  1. 1. Caster, icing and demerara are all types of this common baking ingredient
  2. 2. Famous Pakistani education activist
  3. 3. Class of animals that lizards belong to
  4. 5. Main character of The Selection by Kiera Cass
  5. 8. First Name of America's first president
  6. 9. Base of the basketball team Stephen Curry plays for
  7. 13. Last name of famous American comic that wore a bowler hat and carried a cane
  8. 17. Last name of UK popstar, Dua
  9. 20. Cooking measurement often shortened to Tbsp
  10. 21. Last name of illustrator of the Roald Dahl books
  11. 22. 90s Halloween movie, "Hocus .."
  12. 23. Last name of captain of England women's national football team
  13. 25. Famous Greek philosopher