The Question and Answer section for Wuthering Heights is a great resource to ask questions, find answers, and discuss the novel.
Nelly went to visit Wuthering Heights to see how Hindley and Hareton were doing. She saw little Hareton outside, but he didn't recognize her as his former nurse, so he threw a rock at her and cursed. She found that his father had taught him how to...
That would be Heathcliff.
Which passage are you referring to?