All correct so far and PP319 got one of the bonuses. Here is a hint - the other two bonus answers are similar to the "Atocha" one.

1. The Leopard Skin Cloak of Annie Oakley - PPF
2. The Secret Map of the Bandit Queen - Radman
3. The Pearl Necklace of Gwalior - PP319
4. The Metal Beard of the Egyptian Queen - PPF
5. The Golden Spider Web of Robert the Bruce - PP319
6. The Missing Portrait of Hans Holbein - PPF
7. The Red Sash of Tokugawa Ieyasu - PP319
8. The Lion-Headed Bracelet of Chandragupta - PPF
9. The Helmet of Joan of Arc - PP319
10. Alexander and the Gordian Knot - PPF
11. The Diary of Dr. Livingstone - TSM
12. The Broken Trident of Poseidon - PPF
13. The Very Tall Turban of Ahmed Baba - PP319
14. The Two Cornered Hat of Napoleon - PPF
15. The Thornwood Gavel of Judge Roy Bean - PP319
B1. The Lucky Medallion of Atocha - PP319
B2.
B3.