Letter from J H [John Henry] Poynting, 10 Ampton Road, Edgbaston, Birmingham, to [Joseph] Larmor He wonders if Larmor has tried to understand a letter by [Hugh Longbourne] Callendar in the Philosophical Magazine for October, and attempts to clarify it in letters to Nature. Poynting thinks it 'the most extraordinary piece of bad writing out I have come across'. He notes a difficulty on light pressure and asks for a postcard from Larmor, giving his opinion, and hoping that he will relieve Poynting of the fear of 'senile decay'. 7 January 1914