Copy letter, from Sir John Herschel to William Whewell Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Declines to become a candidate for the Lucasian professorship. Explains his reasons. Has written in support of Charles Babbage. Thanks William Whewell for seeing John Frederick William Herschel's 'Light' through the press. Describes John Frederick William Herschel's travels on the continent, including his 'geologising.' 17 October 1826