"It was no doubt apparent to him that I was not over-familiar with the good things of this world, for I shortly afterward received an invitation to meet him at six o'clock in the Galerie Vitrée of the Palais Royal, whence he led me into one of those restaurants the tempting windows of which I had occasionally passed by. When we were seated, he half laughingly, half inquiringly, asked me whether I would order the dinner. I declined the invitation, saying that we should fare better if he would take the trouble. And for three hours, which passed like a dream, I had him all to myself. How he examined me, and how much I learned in that short time! How to work, what to do, and what to avoid; how to live; how to distribute my time; what methods of study to pursue; these were the things of which he talked to me on that delightful evening." 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."