 When he died in 1993 at the age of 78 , the Daily Telegraph , Guardian and Times all published <unk> . His letters , diaries , pamphlets and placards were given to the Museum of London ; other artefacts went to the <unk> Park Museum . His printing press was featured in Cornelia Parker 's exhibition " The Maybe " ( 1995 ) at the <unk> Gallery , along with Robert Maxwell 's <unk> , one of Winston Churchill 's cigars and <unk> <unk> in a glass box . In 2006 he was given an entry in the Oxford Dictionary of National Biography . 
