sentences:  Although they worked closely in the school it was not until a discussion one day in Mr Berthoud's office that he managed to get Miss Wind to admit to her involvement and they spoke at length about their time there.On a visit to the school in late 2006 Miss Wind commented that no one was allowed to talk about their involvement.They were sworn to secrecy and it was amazing that four Harveians had worked for Ultra during the war.