Correspondence and other papers, including some in original files, but mainly received as loose, unsorted papers. Includes correspondence with participants, supporters and other named individuals (RTBT 5/4/2 and RTBT 5/4/3); Correspondence of Bernard Feld as Pugwash Secretary General (RTBT 5/4/5; for other papers of Bernard Feld see RTBT 5/10/1); Pugwash Statements and Comments on the United Nations Treaty on the Non Proliferation of Nuclear Weapons and other matters (RTBT 5/4/9 and RTBT 5/4/10); Administrative correspondence concerning meeting arrangements, public relations and other matters (RTBT 5/4/6 - 8 and RTBT 5/4/11-12).