Letter from Osmond Fisher, Graveley, Huntingdon, to Sir Joseph Larmor He understands that before his death Lord Kelvin told Larmor that he had given up the view that the Earth having a liquid core was inconsistent with its observed rigidity, as [Simon] Newcome had explained this by rotation. He wishes to reply to Sir Henry Holland, who finds fault in Fisher's theory of the liquid substructure, and Fisher wishes to use Larmor's authority. He asks is Newcome has published on the subject. 30 April 1913