printing machine and towards the end of that Saturday afternoon Nora Marx, with others, had gone to use that machine "to print leaflets". Another version has it that during the afternoon she was in the area of, or visiting, offices of the "Social Justice" organisation in Mataderos, with which she was still involved. Unbeknown to Nora, several days earlier the office had been occupied by government security officials, who then set about detaining anyone who entered the building. One of those detained had recognised and identified Nora, which had led to her arrest. The security officials involved were later determined to have been members of the so-called "First corps of the armed forces" ("Primer cuerpo de las fuerzas armadas"), commanded by Guillermo Suárez Mason, who during the 1980s and 1990s would face a succession of prosections, extraditions and convictions, along with a presidential pardon, in connection with his Dirty War crimes under the 1976-1983 dictatorship. Later years The military government collapsed in 1983, after which it became easier to investigate what had happened to victims of the Dirty War and to pursue some level of justice. Shortly after Nora disappeared Ellen Marx had become a member of the Mothers of the Plaza de Mayo movement. She was one of the women who at some stage during 1977 began to appear in the Plaza de Mayo, directly in front of the presidential palace, participating in silent demonstrations which involved holding up posters of their missing children with the slogan "¿Dónde están?" ("Where are they?"). As the silent demonstrations drew international interest the protestors themselves faced increased danger from the government. Their spokeswoman, Azucena Villaflor, was herself disappeared on 10 December 1977. The campaigners understood that international awareness was one of their most powerful tools. Argentina was an immmigrant nation, home to millions who had emigrated, or whose parents had emigrated, from different European countries. Ellen Marx had herself reinstated her (West) German citizenship as the nightmare Hitler years began to recede into history. The women made urgent representations to the embassies in Buenos Aires of the European countries from which they or their parents had emigrated. The West German embassy representatives were polite but, the women felt, spectacularly less helpful than embassy staff representing the other principal European countries involved. In Nora Marx's case they pointed out that since Nora herself did not hold a West German passport her disappearance was