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Keywords from Image Description:
Briefkuvert Alexander von Humboldt . Briefkuvert Brief von Alexander von Humboldt an Erzherzog Leopold II Groherzog von Toskana Son Altesse Imperiale et Royale Monsieur le Grand Duc de Toscane wohl dorotheum Dorotheum Alexander von Humboldt PDold PDineligible Images from Dorotheum Alexander von Humboldt letters Letters of Germany