Only when Anne Frank's diaries were transcribed in the 1980s did it emerge that 'Kitty' was not unique; she was one of a group of eight recipients to whom Anne addressed the first few months of her diary entries. In some of the notes, Anne references the other names, suggesting she imagined they all knew each other. With the exception of Kitty none of the names were of people from Anne's real-life social circle. Three of the names may be imaginary but five of them correspond to the names of a group of friends from the novels of Cissy van Marxveldt, which Anne was reading at the time. Significantly, the novels are epistolary and include a teenage girl called 'Kitty Francken'. By the end of 1942 Anne was writing solely to her. In 1943 when she started revising and expanding her diary entries she standardised the form and consolidated all of the recipients to one: Kitty.