This task concluded, he went to England, where he was to spend the few remaining days previous to his departure. Among the last words of farewell which reached him just as he was leaving the Old World, little thinking then that he was to make a permanent home in America, were these lines from Humboldt, written at Sans Souci: "Be happy in this new undertaking, and preserve for me the first place under the head of friendship in your heart. When you return I shall be here no more, but the king and queen will receive you on this 'historic hill' with the affection which, for so many reasons, you merit. . ." "Your illegible but much attached friend, "A. HUMBOLDT." So closed this period of Agassiz's life. The next was to open in new scenes, under wholly different conditions. He sailed for America in September, 1846. PART 2. IN AMERICA. CHAPTER 13. 1846: AGE 39. Arrival at Boston. Previous Correspondence with Charles Lyell and Mr. John A. Lowell concerning Lectures at the Lowell Institute. Relations with Mr. Lowell. First Course of Lectures. Character of Audience. Home Letter giving an Account of his first Journey in the United States. Impressions of Scientific Men, Scientific Institutions and Collections. AGASSIZ arrived in Boston during the first week of October, 1846. He had not come to America without some prospect of employment beside that comprised in his immediate scientific aims. In 1845, when his plans for a journey in the United States began to take definite shape, he had written to ask Lyell whether, notwithstanding his imperfect English, he might not have some chance as a public lecturer, hoping to make in that way additional provision for his scientific expenses beyond the allowance he was to receive from the King of Prussia. Lyell's answer, written by his wife, was very encouraging. LONDON, February 28, 1845. . . .My husband thinks your plan of lecturing a very good one, and sure to succeed, for the Americans are fond of that kind of instruction. We remember your English was pleasant, and if you have been practicing since, you have probably gained facility in expression, and a little foreign accent would be no drawback. You might give your lectures in several cities, but he would like very much if you could give a course at the Lowell Institute at Boston, an establishment which pays very highly. . .In six weeks you might earn enough to pay for a twelve months' tour, besides passing an agreeable time at Boston, where there are several eminent naturalists. . .As my husband is writing to Mr. Lowell to-morrow upon other matters, he will ask him whether there is any course still open, for he feels sure in that case they would be glad to have you. . .Mr. Lowell is sole trustee of the Institute, and can nominate whom he pleases. It was very richly endowed for the purpose of lectures by a merchant of Boston, who died a few years ago. You will get nothing like the same remuneration anywhere else. . .