From [Étienne] Geoffroy Saint-Hilaire   [20 May 1839]

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

Please cite as “Herschel3576,” in Ɛpsilon: The Sir John Herschel Collection accessed on 28 April 2024, https://epsilon.ac.uk/view/herschel/letters/Herschel3576