I heard about a girl whose hands and feet were like twigs and she was healed by Baba. Can you tell me her full story?

The story you're referring to is found in a footnote in Chapter 33, as recounted by R. Hari Sitaram Dixit. The girl was the daughter of Khimji Lalji Joshi, a gentleman in a Punjab regiment. She had been ill for a long time and became very serious. Her mother first got some of Baba's Udi, which provided immediate relief. They then took the daughter to Shirdi. She was so weak, with limbs like twigs, that she had to be carried to Baba. Maharaj applied Udi to her and blessed her. Within a few days, she could walk on her own. When she still had trouble getting up, she complained to Baba, who then gave her a fruit to eat, which completely removed that difficulty as well.