Acknowledgements
The plates are reproduced by permission of the following: i, Staatsbiblio-
thek, Berlin; 2 and 14 , Dietz Verlag, Berlin; 3-7, io, 15 , 18 and 26 , Int.
Instituut voor Soc. Geschiedenis, Amsterdam; 9 and 21 , Radio Times
Hulton Picture Library; 11 and 13 , Marx Memorial Library; 12 , David
Heisler, London; 17 , 19 and 22 , Institut fur Marxismus-Leninismus, East
Berlin; 20 and 23 , Communist Party Headquarters, London; 24 , the
British Museum; 25 , Angelo Hornak, London. Nos 8 and 16 were taken
by the author.