Copy letter, from Sir John Herschel to Henry De Worms, dated at Collingwood Copy of a letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Comments on Henry De Worms's The Earth and Its Mechanism. Henry De Worms erred by taking at face value François Arago's 'enormous blunder' of proving rotation from diurnal aberration. 24 November 1862