Describe the letters Charis writes to Gabriel in Part Two, Chapter Sixteen.

Charis writes to Gabriel every month even though she has no way of knowing if the letters are getting through, however, she has not written to him in the last six weeks. When she does write another letter to Gabriel, she tells him everything about the affair except the name of her lover. She then writes a short letter to Felix, saying she has told Gabriel everything and she has decided to go away.