To [Hugh Percy (3rd Duke of Northumberland)]   [1840 to 1847]

The transcript of this letter is not available online on Ɛpsilon.

Please cite as “Herschel8365,” in Ɛpsilon: The Sir John Herschel Collection accessed on 20 April 2024, https://epsilon.ac.uk/view/herschel/letters/Herschel8365