Mary received a phone call from Professor John, which brought great shock to the family. The professor jumped ship. Although little Sheldon is happy that the professor has a new home, Mary is not happy. Connie changed from doubt and disappointment to confusion about her sudden departure from Professor John.

A letter shows that Professor John didn't leave without saying goodbye. When the mailbox at Connie's door was opened, there was a stack of letters in it. Connie hasn't checked her email for a while, which is why Connie hasn't heard from Professor John. Connie went to the front door and leafed through the letters quickly. When we turned to the third letter, Professor John's name appeared on the envelope. It can be seen from this detail that Professor John's letter has arrived for some time, because it is in the middle of a pile of letters.