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/H0005221 https://www.geonames.org/2950159">Berlin</placeName>], Mittwoch, [Anfang 1849], Bl. 1r (<ref xmlns="http://www.tei-c.org/ns/1.0" target="https://edition-humboldt.de/H0006178">https://edition-humboldt.de/H0006178</ref>); 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/H0005221 https://www.geonames.org/2950159">Berlin</placeName>, Donnerstag, [11. Januar 1849] (<ref xmlns="http://www.tei-c.org/ns/1.0" target="https://edition-humboldt.de/H0000009">https://edition-humboldt.de/H0000009</ref>); <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> an Alexander von Humboldt, <placeName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0005221 https://www.geonames.org/2950159">Berlin</placeName>, 13. Januar 1849 (<ref xmlns="http://www.tei-c.org/ns/1.0" target="https://edition-humboldt.de/H0015159">https://edition-humboldt.de/H0015159</ref>).