Persisting slightly with the thread drift on 'difficult' seniors, I had a colleague some years ago who was in a unit support role at Rheindahlen around the time that all the china and glassware in Berlin mysteriously vaporised, a phenomenon apparently wholly unconnected with 3 Pantechnicons subsequently seen heading for the UK. He told me he kept 2 sets of files, one in the office and a duplicate at home because he had been warned that too much detail in his audit trail was likely to result in the files being 'lost' in transit (in the days when files were sent between offices with comments, notes of action etc. on the inside sheet).