Copy letter, from Sir John Herschel to William Whewell, dated at Collingwood Copy of letter, possibly incomplete, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Hopes to arrange a meeting with William Whewell at the invitation of a Mr. Hope. Discusses John Frederick William Herschel's recent photographic works and sends some photographs of improved quality. July 1842