How we cite our quotes:
[Lockwood:] I began to feel unmistakably out of place in that pleasant family circle. (2.63)
No matter how insightful he believes he is, Lockwood ultimately remains an outsider to the scene he describes. Nonetheless, he believes he has a chance with the young Catherine. The question is: knowing what he knows, why would be want to marry into this family? What does that tell us about him as a narrator?
The ledge, where I placed my candle, had a few mildewed books piled up in one corner; and it was covered with writing scratched on the paint. This writing , however, was nothing but a name repeated in all kinds of characters, large and small – Catherine Earnshaw, here and there varied to Catherine Heathcliff, and then again to Catherine Linton. (3.7)
Catherine's entire story is cryptically recorded on the ledge of her bed. She will become Catherine Linton, as she fantasizes about as a young girl, but it is her daughter who becomes Catherine Heathcliff.
"I see the house at Wuthering Heights has 'Earnshaw' carved over the front door. Are they an old family?"
"Very old, sir; and Hareton is the last of them, as our Miss Cathy is of us – I mean, of the Lintons." (4.27)
What becomes of these two family lines is one of the main concerns of the novel. As Nelly explains this piece of family history, she lets it slip how much she sees herself as one of the Lintons. This suggests that there may be some bias in her narrative.