Letter from Oliver Heaviside, Bradley View, Newton Abbot, to [Joseph] Larmor Commencing: 'Brain stiffening refers to tonic property, but it may be misunderstood, so I will delete it'. On Larmor's recommendation he went to p.116, 'They get [Augustin Jean] Fresnel all right'. He will mention it in his book and he has found other examples, but none better than Larmor's. Heaviside does not follow [Hendrik Antoon] Lorentz's way, but with his fundamental equations he does not get Fresnel. 27 August 1900