How did the robin help Mary to find The Secret Garden?

In Frances Hodgson Burnett's "The Secret Garden," the robin plays a crucial role in guiding Mary Lennox to the hidden garden. After Mary discovers the bird in the grounds of Misselthwaite Manor, it begins to lead her through the estate, ultimately showing her the entrance to the secret garden by flitting back and forth to a keyhole covered by ivy. This act of the robin symbolizes the connection between nature and healing, as it encourages Mary to explore and engage with her surroundings.