Copy letter, from Sir John Herschel to Spencer J. A. Compton, 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. In response to HS/5/272, will write an obituary notice for Hugh Percy (3rd Duke of Northumberland) for the Royal Society [of London] in the time available. Has previous work committment to submit on 1 December, and few resources at hand. Will do his best. 2 November 1847