Letters ... written between the years 1827 and 1858, to Varnhagen von Ense. Together with extracts from Varnhagen's diaries, and letters from Varnhagen and others to Humboldt. Authorized translation from the German, with explanatory notes and a full index of names.
Humboldt, Wilhelm,Freiherr von,1767-1835.
London,
1860.