E S Pearson's Retirement Material relating to E S Pearson's retirement from the Department of Statistics and from Biometrika. Includes lists of files taken from his office; lists of books donated to the department and to UCL library services; correspondence relating to the disposal of his papers and their transfer to the library in 1979; and personal correspondence, particularly relating to the blue plaque for Karl Pearson at 7 Well Road, Hampstead 1974-1980