His comrades Ieng Sary and Hou Yuon became teachers at a new private high school, the Lycée Kambuboth, which Hou Yuon helped to establish. Khieu Samphan returned from Paris in 1959, taught as a member of the law faculty of the University of Phnom Penh, and started a left-wing French-language publication, "L'Observateur". The paper soon acquired a reputation in Phnom Penh's small academic circle. The following year, the government closed the paper, and Sihanouk's police publicly humiliated Samphan by beating, undressing and photographing him in public; as Shawcross notes, "not the sort of humiliation that men forgive or forget". Yet the experience did not prevent Samphan from advocating cooperation with Sihanouk in order to promote a united front against United States activities in South Vietnam. Khieu Samphan, Hou Yuon and Hu Nim were forced to "work through the system" by joining the Sangkum and by accepting posts in the prince's government.