La Vallée de la peur
Previous Watson performer Hubert Willis was replaced by Arthur M. Cullin in the role as director Maurice Elvey felt that Willis was too old to woo the much younger Isobel Elsom as Mary Morstan. Norwood was unimpressed with Cullin in the role although Cullin brought previous experience having played Watson to H. A. Saintsbury's Holmes in "The Valley of Fear".