Frank's diary began as a private expression of her thoughts; she wrote several times that she would never allow anyone to read it. She candidly described her life, her family and companions, and their situation, while beginning to recognize her ambition to write fiction for publication. In March 1944, she heard a radio broadcast by Gerrit Bolkestein—a member of the Dutch government in exile, based in London—who said that when the war ended, he would create a public record of the Dutch people's oppression under German occupation. He mentioned the publication of letters and diaries, and Frank decided to submit her work when the time came. She began editing her writing, removing some sections and rewriting others, with a view to publication. Her original notebook was supplemented by additional notebooks and loose-leaf sheets of paper. She created pseudonyms for the members of the household and the helpers. The van Pels family became Hermann, Petronella, and Peter van Daan, and Fritz Pfeffer became Albert Düssell. In this edited version, she addressed each entry to "Kitty," a fictional character in Cissy van Marxveldt's novels that Anne enjoyed reading. Otto Frank used her original diary, known as "version A", and her edited version, known as "version B", to produce the first version for publication. Although he restored the true identities of his own family, he retained all of the other pseudonyms.