Ghosh's narrative follows a number of characters, each of whom plays a significant role. What character is most central to the story? How does this character enable the story to unfold?

Towards the end of the narrative, Urmila tells Murugan the story of what happened to Phulboni at Renupur station when he was a young man. What is the significance of this retelling?  

What role does colonialism/post colonialism play in the novel? Cite three examples.