On chapter 34-37 What incident changes the bishop's mind?

The Bishop wants Kumalo to go to Pietermaritzburg to his friend Ntombela, whom Kumalo would help. The Bishop tells Kumalo that if he stays, there will be many loads on his shoulders, including the rebuilding of the church. Kumalo receives a letter from James Jarvis, who tells Kumalo that it was one of his wife's last wishes that a new church be built at Ndotsheni and that his wife had been in poor health even before Johannesburg. The Bishop asks to see the letter, and Kumalo tells him about the milk. He finally decides that it is not God's will that Kumalo should leave Ndotsheni.