Copy letter, from Sir John Herschel to John William Lubbock, 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. About observing binary stars. John Frederick William Herschel has decided not to accept the offer of passage on a war ship to the Cape of Good Hope, as he wishes to be beholden to no one for the results of the expedition. 16 May 1833