Where is Robin's will hidden?

1 What is the colour of Robin's Porsche?
2 What is the name of his famous London restaurant?
3 Who did Robin's secretary have dinner with on the night of the murder?
4 Where did the Kochs go to a dinner dance?
5 Which university did Leopold Koch teach in?
6 What is Ingrid's job?

Answers:
1 Yellow
2 (the) Restaurant at the End of the Universe
3 Alex Finch
4 (the) Imperial Hotel
5 Vienna University
6 Actress
{ANSWER: The will was hidden in the aviary}