To [G. Wharton Simpson?]   [1864 to 1866]

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

Please cite as “Herschel13508,” in Ɛpsilon: The Sir John Herschel Collection accessed on 5 June 2025, https://epsilon.ac.uk/view/herschel/letters/Herschel13508