'I KNOW IT WAS MURDER - PLEASE HELP ME PROVE IT ' The Duke of Chellingworth's beloved butler is grieving his brother's death...but was it a really a tragic accident, or was it - as the man's widow believes - murder? Mavis and the dowager Althea offer the services of the WISE Enquiries Agency to investigate, which puts one of their team in a dangerous situation. Meanwhile, Annie and Tudor are puzzled by a spate...