Stuttgart und Augsburg: J.G. Cotta Verlag, 1845 - 1858. 4 volumes bound in original green pebbled cloth and gilt, 6x4.5 inches, marbled edges, text in German. Ex libris; institutional bookplates the sole clue of this, apparently an old holding, these bookplates removed in all but volume 4. Ownership bookplates also present along with an ownership legend dated 1956. First edition of von Humboldt's masterwork, the four volumes published before his death. An atlas was published posthumously and is not included here. Condition is very good except for foxing, slight edgewear with bits of fraying, front hinge of volume 4 is cracked and the joint is split and fraying.