-1. What was the name of the early photographs produced on highly polished silver-coated copper plates sensitized with iodine?
-2. Who is the patron saint of music and of musicians?
-3. Which crime novellist mysteriously disappeared for 11 days in December 1926?
-4. What is the common name for ethanoic acid?
-5. Which company designed the Betamax video cassette format?
-6. Who wrote the Everley Brothers' hit Claudette for his wife Claudette Frady?
-7. What name is given to animals such as kangaroos, wallabies and opossums?
-8. What island is known as "the teardrop of India"?
-9. Which city played host to the 2010 Winter Olympic?
-10. What is draped over the branch of a tree in Salvador Dali's painting The Persistence of Memory?
-11. According to Greek legend, what event precipitated the Trojan War?
-12. Who is this?

3. Agatha Christie

12. Chuck Berry

Two good ones, ladies!

Ah, the old duck-walk, oldbroad

7. marsupials

A very bouncy solve, Cheryl!

You got it Rog!

1. Daguerreotype ?? And if I've spelt it correctly

As Eric Morecombe could have said "They're the right letters but not necessarily in the right order"

So have I spelt it incorrectly then

I take it all back, Mad. Didn't look quite right, but turned out to be perfect

9. Vancouver

'twas ever so, manxman!

8 - Sri Lanka

4. acetic acid

2. St. Cecilia

I went to St Cecilia School as a child, and later taught school there.

11. Paris kidnapping Helen of Troy

10. A stopwatch?

5. Sony
It was a wrench to get rid of all my Betamax tapes when my machine finally died.

A great selection - all correct!

6. Roy Orbison

Nice finish, manxman!