Anthony Blunt and Guy Burgess are said to feature, along with theatrical greats Gielgud, Olivier and Welles in Sir Michael Redgrave s archive of diaries, letters, papers, photographs and recordings, recently purchased by The Theatre Museum. This rare and unique material, said to require in excess of 40 metres of shelf space, will take two years to catalogue, after which it will be available for viewing in exhibitions and online.