<ref xmlns="http://www.tei-c.org/ns/1.0" target="https://edition-humboldt.de/H0016785?l=en">Christian Gottfried Ehrenberg’s Diary of the Russian-Siberian Journey</ref> with Humboldt (1829), which contains numerous references to zoological and <ref xmlns="http://www.tei-c.org/ns/1.0" target="https://edition-humboldt.de/register/pflanzen/index.xql?id=H0016785&l=en">botanical specimens sent</ref> to collections in Berlin and Paris, has already been published in 2019 as part of the <hi xmlns="http://www.tei-c.org/ns/1.0" rendition="#i">edition humboldt digital</hi>.