To Algernon Percy (4th Duke of Northumberland)   17] May [1847

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

Please cite as “Herschel7454,” in Ɛpsilon: The Sir John Herschel Collection accessed on 19 April 2024, https://epsilon.ac.uk/view/herschel/letters/Herschel7454