How might it have been if Holmes and Watson grew into great age together with all the forgetfulness and infirmities that age brings? And Moriarty, Holmes's arch rival would be doddering around still and causing trouble; perhaps by using modern technology such as the wireless to agitate in any way he can to cause the most disturbance by some dastardly machine that can interrupt the wireless waves and put his voice there, even though he sits in his wheelchair and is housebound.