They Do It With MirrorsA man is shot at in a juvenile reform home but someone else dies Miss Marple senses danger when she visits a friend living in a Victorian mansion which doubles as a rehabilitation centre for delinquents. Her fears are confirmed when a youth fires a revolver at the administrator, Lewis Serrocold. Neither is injured. But a mysterious visitor, Mr Gilbrandsen, is less fortunate shot dead simultaneously in another part of the building. Pure coincidence?