Copy letter from Archibald Geikie, to H J Ferrar He can hardly do better than place himself in [William Napier] Shaw's hands in regard to his carbonic anhydride and sea water[?] observations. Geikie knew Ferrar had taken these observations, and that the Carbonic Anhydride paper had been proposed by Dr Letts and Ferrar, but he did not quite understand about the date. 14 November 1904