What is the bond that unites the two, Mr Lamb and Derry? How does Mr Lamb inspire the boy?

Explanation

Mr Lamb and Derry are suffering from the same sort of physical impairment. Mr Lamb does not have one leg while Derry’s face is burnt from one side. They both are feeling lonely. No one ever comes to see Mr Lamb and people have spread many stories about him. People look at awe at Derry’s face and generally avoid him. Thus they both are suffering from common problems. This bond unites Mr Lamb and Derry.