How does linton help Cathy escape to return to her father?

Linton helps Cathy escape to return to her father by providing her with a means of transportation and a plan to evade her captors. He secretly arranges for her to leave Thrushcross Grange, knowing that her health and well-being are at stake. Despite his own conflicted feelings and the oppressive atmosphere of their home, Linton's actions reflect his desire to protect Cathy and facilitate her reunion with her father, demonstrating a complex mix of loyalty and love.