Noble Humboldt! so great that everybody honored and looked up to him; so kindly interested in others that everybody loved him!
In 1827, at the request of his king, Humboldt returned to Berlin, and became chamberlain, with a yearly salary of five thousand thalers. He gave this year, before the university, a course of free, public lectures upon physical geography, sixty nine in all, which afterwards formed the basis of his grandest work, "Cosmos." The first four lectures were a general description of nature; then astronomy, the principal outlines of geology and meteorology, the distribution of plants and animals, the history of the study of our globe, volcanoes, the ocean, the atmosphere, and the human race.
The lectures were crowded and the applause unexampled. A second course, of sixteen lectures, was given to the public in the music hall, the royal family coming with the thousands who gathered each evening.
A grand way to educate the people! Would that at the expense of some philanthropist such a course might be given in every city.
In 1829, at the request of Emperor Nicholas, Humboldt made a scientific expedition to eastern Russia, travelling over nine thousand miles in twenty-five weeks. He was now in his sixtieth year, but he climbed high mountains with no apparent fatigue.
The emperor was delighted with the results of the expedition, which were published in several volumes. He said, "Your sojourn in Russia has been the cause of immense progress to my country; you spread a life-giving influence wherever you go." He presented Humboldt with a sable cloak worth five thousand rubles, and a malachite vase seven feet high, worth nearly forty thousand rubles.
The death of friends saddened this busy year, 1829. William's wife had died, and left him utterly desolate. In his ministry to several countries, she had honored and graced his diplomatic positions. He did not long survive her. "Wholly given up to grief," said Alexander, "he seeks in the depth of his misery the only consolation that can render life supportable, while he occupies himself with intellectual pursuits as with the drudgery of a task."
He died four years later, tenderly watched over by his illustrious brother, to whom he said in dying, "Think of me often, but always with cheerfulness. I have been very happy, and even to-day has been a glorious day with me, for there is nothing more beautiful than love. I shall soon be with the mother, and enter upon a higher order of being."
This death was a great blow to Alexander. He said, "I am quite bereft of hope. I did not think that my old eyes could have shed so many tears.... I am the unhappiest of men.... I have lost half of myself." A few months later William's eldest daughter, Caroline, died, to whom Alexander was tenderly attached. From henceforth his life was devoted to his sovereign Frederick William IV., to "Cosmos," and to his ever widening circle of friends. Two thousand letters or more came to him yearly, and till late in life he answered each one, and answered it promptly, showing thereby how truly well bred he was in manner, and how truly kind in heart.
In 1834, when he was sixty-five, he began the publication of "Cosmos," in five volumes, the "most comprehensive compendium of modern science." It was soon translated into English, meeting with a cordial reception in that country, and into French, Dutch, and Italian.