Question

why did ali did not go to postoffice for many days? why was he impatient when he finally returned to the Post office

Answer 1

Ali could not go to the post office as he was very sick and had clear signs of approaching death . He was impatient when he finally returned to the Post Office as he knew it was his last day as he was about to die and was anxious as he had not received Miriam's ( his daughter) letter .

Answer 2

Ali did not came to post office for many days as he was not feeling well his health condition were very poor .
Ali became impatient when Postmaster had insulted him he said , "what pest you are brother ".