Answer:
At the Miss Havisham's house.
Explanation:
The interaction between Pip and Jagger happen at the house of Miss Havisham's house. Mr. Jagger first appears who passes Pip on the stairs at Miss Havisham's house. He never tells anyone and gives Pip no clues about where the money has come from. When Pip was just a boy, Jagger rescue a convict. That convict gave huge amount of money to Mr. Jaggers to become Pip's guardian and lead him into the upper class lifestyle.
The answer is intervention