Copy letter from Robert William Frederick Harrison, to Professor Michael Foster, [Fellow of the Royal Society] The enclosed [not enclosed] from the Duke of Argyll came today. The Hammond typewriter is at 50 Queen Victoria Street. Harrison explains that he used to use a 'Hammond' himself and thinks they are good, although the 'Remington' is better. Knows that Sir William Huggins and Professor Ramsay both use a 'Hammond'. Professor Rucker would like to have the Duke of Argyll's letter when Foster has read it. Also encloses [not enclosed] a letter from Professor Rucker with a document from Lord Kelvin. 31 January 1898