From [A. J. F.] Yvon Villarceau   [17 November 1864]

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

Please cite as “Herschel13612,” in Ɛpsilon: The Sir John Herschel Collection accessed on 28 April 2024, https://epsilon.ac.uk/view/herschel/letters/Herschel13612