Title: Letters of Alexander von Humboldt written between the years 1827 and 1858 to Varnhagen von Ense
Subtitle: together with extracts from Varnhagen's diaries, and letters of Varnhagen and others to Humboldt
First published: 1860
People: Karl August Varnhagen von Ense (1785-1858), Alexander von Humboldt (1769-1859)