In an interview in 1986, Prince Pujie told Behr: "Puyi constantly talked about going to England and becoming an Oxford student, like Johnston." On 4 June 1922, Puyi attempted to escape from the Forbidden City and planned to issue an open letter to "the people of China" renouncing the title of Emperor before leaving for Oxford. The escape attempt failed when Johnston vetoed it and refused to call a taxi, and Puyi was too frightened to live on the streets of Beijing on his own. Pujie said of Puyi's escape attempt: "Puyi's decision had nothing to do with the impending marriage. He felt cooped up, and wanted out." Johnston later recounted his time as Puyi's tutor between 1919 and 1924 in his 1934 book "Twilight in the Forbidden City", one of the main sources of information about Puyi's life in this period, though Behr cautioned that Johnston painted an idealised picture of Puyi, avoiding all mention of Puyi's sexuality, merely average academic ability, erratic mood swings, and eunuch-flogging. Pujie told Behr of Puyi's moods: "When he was in a good mood, everything was fine, and he was a charming companion. If something upset him, his dark side would emerge."