Autograph letter signed ("AVHumboldt").
Large 4to. 2 totalling 1 p. on double leaf.
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.