It is impossible to express the gratification – <lb xmlns="http://www.tei-c.org/ns/1.0" />which <ref xmlns="http://www.tei-c.org/ns/1.0" xml:id="cbbe5932-9348-45d8-be59-32934865d808" corresp="#df25cb99-1dc2-43d3-a5cb-991dc223d3da" type="editorialNote">your highly interesting & learned Letter</ref><note xmlns="http://www.tei-c.org/ns/1.0" xml:id="df25cb99-1dc2-43d3-a5cb-991dc223d3da" corresp="#cbbe5932-9348-45d8-be59-32934865d808" type="editorial">Vgl. Humboldt an Lambert, Paris, 17. August 1820 (Royal Botanic Gardens, Kew, A. B. Lambert Correspondence). </note> afforded me; as <lb xmlns="http://www.tei-c.org/ns/1.0" /><choice xmlns="http://www.tei-c.org/ns/1.0"> <sic>their</sic> <corr cert="high">there</corr> </choice> is no man I am so proud of hearing from as yourself and <lb xmlns="http://www.tei-c.org/ns/1.0" />when ever you will do me the honour of writing to me, it will <lb xmlns="http://www.tei-c.org/ns/1.0" />prove the highest gratification I can experience.