What Mr. Craven has to say about Mrs. Sowerby situates her as an expert on childrearing. It's telling then that what Mrs. Sowerby believes it most important is independent play outside, as she knows that this will help Mary develop a sense of independence and curiosity, grow strong, and learn to think of others aside from herself. Bringing up Mrs. Craven on the moor also suggests that for Mr. Craven, reminders of his late wife are still very powerful, and that he's still grieving.