Copy of a letter, from John Frederick William Herschel to Richard Sheepshanks Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Alerts Richard Sheepshanks to the fact that there is an 'underhand sale' of the prints of [H. W.] Pickersgill's portrait of John Frederick William Herschel going on, as John Frederick William Herschel's cousin bought one. 25 February 1840