95% sureThese words were traced back to where they first appeared. That source is listed below.
What turned up
Letters of Alexander von Humboldt to Varnhagen von Ense, trans. Friedrich Kapp (Rudd & Carleton, 1860; Gutenberg #67420). Letter 61, Humboldt to Varnhagen, Dec. 7, 1841.
Work
Letters to Varnhagen von Ense
Occasion
1841 · praising a friend's biography of the soldier Schwerin
Sources checked
gutenberg.orgChecked using claude-sonnet-5, 21 August 2026Kapp translation, Letters of Alexander von Humboldt to Varnhagen von Ense; letter of Dec. 7, 1841 praising a friend's biography
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