Copy letter, from Sir John Herschel to Sir Charles Lyell, 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. Begs Charles Lyell and Edward Sabine to cancel their plan to interview John Frederick William Herschel for office [Presidency] in R.S.L. To continue will cause John Frederick William Herschel 'inexpressible pain.' 10 March 1848