Bronte was forced to take upon a male pseudonym, so that he voice could be successfully heard in the Victorian era. Similarly, Nelly's narration has to be told through a man; Lockwood is mocked by Bronte, he is dim-witted, vain and unable to read emotions. Lockwood is used as political statement for her male readers. I am assuming that Nelly is used as she is the only survivor in the 1st generation. She has a personal and intimate understanding of the situations, which could possibly be bias because she is so close to Heathcliff, Cathy and Edgar. Bronte could have possibly written in third person narrative, but then she would not have been able to make her political views and therefore, her novel would not have been regarded as such a powerful one that it is.