Following one of many suicide attempts and manic or depressive episodes, Sexton worked with therapist Martin Orne. He diagnosed her with what is now described as bipolar disorder, but his competence to do so is called into question by his early use of allegedly unsound psychotherapeutic techniques. During sessions with Anne Sexton he used hypnosis and sodium pentothal to recover supposedly repressed memories. During this process, he allegedly used suggestion to uncover memories of having been abused by her father. This abuse was disputed in interviews with her mother and other relatives. Orne wrote that hypnosis in an adult frequently does not present accurate memories of childhood; instead, "adults under hypnosis are not literally reliving their early childhoods but presenting them through the prisms of adulthood." According to Orne, Anne Sexton was extremely suggestible and would mimic the symptoms of the patients around her in the mental hospitals to which she was committed. Diane Middlebrook's biography states that a separate personality named Elizabeth emerged in Sexton while under hypnosis. Orne did not encourage this development and subsequently this "alternate personality" disappeared. Orne eventually concluded that Anne Sexton was suffering from hysteria. During the writing of the Middlebrook biography, her daughter, Linda Gray Sexton, stated that she had been sexually assaulted by her mother. In 1994, she published her autobiography "Searching for Mercy Street: My Journey Back to My Mother, Anne Sexton", which includes her own accounts of the abuse.