11. The crime of the opera house [Volume 2 Copy 2] Creator: Du Boisgobey, Fortune?, 1821-1891. Date: 1886 Format: Text Access: Public
12. The detective's eye Creator: Du Boisgobey, Fortune?, 1821-1891. Date: 1886 Format: Text Access: Public
13. The steel necklace [Copy 1] Creator: Du Boisgobey, Fortune?, 1821-1891. Date: 1886 Format: Text Access: Public
14. In the serpents' coils [Copy 2] Creator: Du Boisgobey, Fortune?, 1821-1891. Date: 1885 Format: Text Access: Public