What are the actions thoughts and motivations of vanka how do they relate contribute to the theme of the story

Vanka is a nine-year-old boy who was apprenticed to the family of Alyakhin the shoemaker. Previously, while his mother was alive, Vanka lived with her and his grandfather in a village that Chekhov leaves unnamed. Upon his mother's death, Vanka was transferred to Moscow, to new masters who mistreated him. One Christmas Eve, Vanka decided he was unable to take any more of the disastrous conditions and sat down to write a letter to his grandfather, asking the old man to take him back to the village. While writing his letter, Vanka both imagines his grandfather's present actions and dwells on a series of pleasant scenes from his past life.

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