Copy letter, from Sir John Herschel to William Whewell, dated at Collingwood Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Responding to a published statement by William Whewell regarding the discovery of Neptune, John Frederick William Herschel presents in detail a different interpretation, giving more credit to U. J. J. Leverrier than William Whewell favored. Suggests that some observatory make a photographic record of sunspots. 29 December 1846