The questions
1 In the British Library, what is Cotton MS Vitellius A XV, f. 132r?
2 Which metal is used in batteries and antidepressants?
3 What duetted with the cellist Beatrice Harrison for 12 years?
4 Where might you encounter a Brocken spectre?
5 What is the most populous US state capital?
6 Which Ian Fleming title pluralised a slogan used by De Beers?
7 NC500 is a route around where?
8 Which Indian religion was founded in the late 15th century?
What links:
9 Aviva; Elle; Maoam; Nissin; Oxo; Xanax?
10 1960-1976 (4); 1980 (8); 1996 (16); 2016 (24)?
11 Oswald Cobblepot; Feathers McGraw; Mumble; Pingu?
12 Another Brick in the Wall; DDU-DU DDU-DU; Just Like a Pill; The Last Film?
13 Arne; Bempton Cliffs; Forsinard Flows; Minsmere; Snettisham?
14 Frankenstein; Strange Case of Dr Jekyll and Mr Hyde; Kubla Khan; Misery; Twilight?
15 Augustus; Chandragupta; Cyrus; Jimmu; Qin Shi Huang?
The answers
1 Beowulf (only surviving copy).
2 Lithium.
3 Nightingales.
4 In the mountains.
5 Phoenix (Arizona).
6 Diamonds are Forever.
7 Scotland (north coast).
8 Sikhism.
9 Brands that are palindromes.
10 UEFA European Football Championship (number of teams).
11 Fictional penguins.
12 Pink hits: Pink Floyd; Blackpink; Pink; Kissing the Pink.
13 RSPB reserves.
14 Literary works inspired by dreams: Mary Shelley; RL Stevenson; Coleridge; Stephen King; Stephenie Meyer.
15 First emperors: Rome; India; Persia; Japan; China.