Alexander von Humboldt an <persName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0012068 http://d-nb.info/gnd/118554727">Wilhelm von Humboldt</persName>, <placeName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0008129 https://www.geonames.org/2988507">Paris</placeName>, 29. Oktober 1824 (<bibl xmlns="http://www.tei-c.org/ns/1.0" corresp="https://edition-humboldt.de/MEWSVCXM">Humboldt 1923</bibl>, 155).