The major part of this long sequence (in addition to long sections on Germany, Spain and Russia) is concerned with relations with Trade Union National Centres, with correspondence relating to strikes, appeals for support, exchanges of delegations, invitations to attend Congresses, etc. The series highlights the difficulties faced in many countries, where suppression, factions, etc. were great problems, and, in the case of the European files, includes many files on the suppression of bodies following Nazi/Russian invasions and subsequent setting-up of a centre in exile, often in London. N.B. some of the material is not in English and not all of it has been translated.