What do you learn about Sallys gun in chapter 19, what does she wish for in relation to her weapon? can you link his to any foreshadowing in the novel?

Thankfully, Sally followed her father's advice and made sure she always had a gun on her. She shoots Van Eeden before he can hurt her. The foreshadowing in various parts of the book is resolved in these last chapters. The mysterious man who was sailing into London was Van Eeden, who is also Ah Ling. This is the man who killed Selby, and probably the man who killed Matthew Bedwell. He did not want the information about his illegal activities to get out.