On 21 September 1942, Anne wrote a short note to Jettje in her diary. A little further on, she wrote another one to Emmy. One day later, on September 22, she wrote to Kitty. Yet she still wrote to Pop, Jackie, Marianne, Conny, and other girls. Kitty was a character from the books about Joop ter Heul, written by Cissy van Marxveldt. Anne was very fond of this series.