Copy letter, from Sir John Herschel to J. W. Morton, dated at Slough Contemporary copy in sender's hand, signed by sender. Rejects offer of payment of £75 for serving as a Commissioner of Longitude, explaining that John Frederick William Herschel has 'ceased to consider myself a public functionary from the moment I became acquainted with the intentions of Government respecting the dissolution of the Board of Longitude.' 12 January 1830