1. Pip is talking. He is in a graveyard. He is visiting his (dead) brothers and parents. He is crying because his whole family is dead and also because he is scared, scared of the unknown and the darkness scared of the wind, scared of the gates and the marshes.
Dad >> Philip
Mom >>Georgiana
Brothers >> Alexander, Bartholomew, Abraham, Tobias, and Roger
3. Dickens uses a lot of commas and semi-colons to make it possible to write as much as possible in one sentence.
