Copy of a letter, from John Frederick William Herschel to Richard Sheepshanks, 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. Says he will guardedly write in his Outlines Astr. what he has to say about Neptune and the controversy surrounding its discovery. States that he eschews formulae. 20 January 1849