Another aspect of this work was that a number of historians in the IS devoted themselves to rediscovering the past of rank and file movements in the labour movement. A series of articles by Jim Higgins on this topic was published in the group's journal "International Socialism". Other related work appeared in book or pamphlet form including books on the Communist Party related Minority Movement of the 1920s and the industrial politics of the CPGB in that period. Work was also done on the pre-World War I period with Raymond Challinor's book on the Socialist Labour Party entitled "The Origins of British Bolshevism".