Roberts was convinced that the medium Helen Duncan was a fraud and wrote a foreword to the book The Trial of Mrs. Duncan (1945) by Helena Normanton.
In 1944, Helen Duncan was gaoled under the Witchcraft Act on the grounds that she had claimed to summon spirits.
Helen Mirren | Helen Keller | Helen | Helen of Troy | Helen Hayes | Helen Clark | Isadora Duncan | Helen Reddy | Helen Frankenthaler | Duncan Sandys | Arne Duncan | Helen Hunt | Helen Humes | Duncan, British Columbia | Seymour Duncan | Sandy Duncan | Iain Duncan Smith | Duncan Hines | Duncan Edwards | John Duncan | Helen Razer | Helen Fielding | Helen Allingham | Duncan MacLeod | Duncan | John Duncan (artist) | Helen Storrow | Helen Shaver | Helen Caldicott | Adam Duncan |