Autograph letter signed ("AVHumboldt").
Potsdam, 30 June 1848.
Large 4to. 1½ pp. on bifolium.
€ 5,000.00
A letter of recommendation to an unnamed "Excellency" on behalf of Heinrich (Henry) Lange, a young geographer and painter who had once worked on A. K. Johnston's "Physical Atlas", and whom Humboldt wanted to provide with a position at the Prussian Plankammer.
Contemporary note; somewhat spotty and minor edge defects.