Copy letter, from Sir John Herschel to W. K. von Haidinger, 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. Thanks Wilhelm Haidinger for materials Wilhelm Haidinger sent, including information about scientific activity in Vienna and papers on meteorites. Recounts some of the history of the Analytical Society. Discusses meteorites and also Homeric references to iron. 9 April 1870