1945, the prison was used for Norwegians tried or convicted of treason or collaboration, as a part of the legal purge in Norway after World War II. Since the name "Grini" was now associated with the Norwegian resistance movement, hence seen as heroic, the camp was renamed Ilebu. The new name also reflected the actual location of the camp better. 3,440 people were imprisoned here in July 1945. The conditions in the camp were unhealthy, with beri-beri breaking out in the summer. A guard reported that punitive exercise was used in a harsh way. On 13 October 1945 the National Mobile Police Service conducted a razzia (police raid). During the razzia, prosecutor Lauritz Jenssen Dorenfeldt and the wife of camp commandant Helge Gleditsch were wrongly rounded up in the yard. It was closed in 1951 but reopened in the same year under the name Ila as a "landsfengsel og sikringsanstalt" (national prison and security institution), a prison for criminals serving long-term sentences. Much of the camp, including the barracks, has been torn down. One preserved barracks building today stands at Kadettangen. There is also a museum, the Grini Museum, near today's Ila prison. The preserved barracks was moved back in 2010. Printed documentation Architect Odd Nansen managed to preserve most of his diaries from Grini and Sachsenhausen, and selections from these were issued in 1946 as the three-volume book Fra dag til dag (From Day to Day). Volume one covers the period from January 1942 to August 1942, volume two covers August 1942 to August 1943, and volume three covers Nansen's stay in Sachsenhausen. In 1946 and 1947 the two-volume book Griniboken (The Grini Book) was issued, edited by August Lange and Johan Schreiner, with contributions from several of the detainees. The first volume describes daily life at Grini as it developed over the years, including separate articles on the women's department, on the "Haft" departments (for men and women), and on "Fallskjermen", the department for those who were sentenced to death and awaiting execution. The second volume covers the internal organisation, such as the labor, farm work, and healthcare regimes, in more detail, and also discusses cultural and religious life. The external locations (Kvænangen, Kongsvinger, Bardufoss, and others) are described. There are also chapters on the undercover resistance at Grini, such as the news service, espionage, and the secret finger-signing language which was developed. Børre R. Giertsen's 1946 book