One day, Mary Lennox woke up with appetite- she was HUNGRY! She didn’t take her eyes off her breakfast- only when it was all eaten. Martha sees that and says to the Indian girl that she was very proud of Mary.
When Mary goes out, she discovers that the robin which is Ben Weatherstaff’s friend is now her friend too!
She was so happy that she discovers a new feeling-love. She discovers that someone (even if it’s a robin) likes her and she likes it too.
In the afternoon, when Martha was in Mary’s room, they hear a very low cry. Martha says it is nothing- it’s just the wind in the moor.
http://www.pagebypagebooks.com/Frances_Hodgson_Burnett/The_Secret_Garden/THE_CRY_IN_THE_CORRIDOR_p1.html (Chapter link)