Alexander von Humboldt an <persName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0001517 http://d-nb.info/gnd/115674667">Carl Sigismund Kunth</persName>, <placeName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0008392 https://www.geonames.org/2852458">Potsdam</placeName>, Freitag, [24. November 1848] (<ref xmlns="http://www.tei-c.org/ns/1.0" target="https://edition-humboldt.de/H0000608">https://edition-humboldt.de/H0000608</ref>).