Copy letter, from Sir John Herschel to William Rutter Dawes, dated at Slough Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Comments on, and compares, William Rutter Dawes's observations of several double stars with the observations of John Frederick William Herschel and other astronomers. In a postscript John Frederick William Herschel says 'The papers have told the truth for once—we sail sometime between Sept. and Dec.' 4 May 1833