What is the summary of "Postmaster?"

Tagore's short story is probably one of the most profound
works in his vast arsenal of composition.  The story revolves around a postmaster who is
relocated from his native urban setting of Calcutta to a remote village.  In this
village exists an orphaned girl of Ratan, who is discarded and marginalized in the
village.  The Postmaster finds the transition to village life a difficult one and this
precludes him from fully being able to execute his responsibilities.  Ratan slowly
emerges as the only source of assistance for him.  She takes care of him and helps him
battle from illness while tending to him as best as he could ever hope.  At the same
time, he teaches her how to read and her loyalty to him increases, becoming even more
fervent. The entire while, the postmaster still yearns to go back to his urban setting. 
At a certain point, he must leave and Ratan, recognizing both her need for him and
perhaps his need for her, begs to take her with him back to the city, he laughs and
leaves her behind.  The closing of the short story involves the Postmaster reflecting
about his decision, recognizing that he might have done the wrong thing, and then
seeking to rationalize it away from his consciousness.