Copy letter, from Sir John Herschel to John Wrottesley, dated at Collingwood Copy of letter, copied by Isabella Herschel in 1875 as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Is able to sit up in a wheel chair only a few hours a day; John Frederick William Herschel's illness has left him out of the sphere of scientific activity so he is unable to make any useful suggestions about medals. 28 March 1856