Copy letter, from Sir John Herschel to John Stuart Mill, 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. Is willing to have John Stuart Mill show Comte John Frederick William Herschel's letter of 1845-7-13, but not John Frederick William Herschel's 1845-7-16. The latter of these two was intended to show John Stuart Mill the nature of the argument from John Frederick William Herschel's perspective. 18 July 1845