I lost some time by this, but fortunately I had nearly finished my work at the Herbarium, and afterwards I had a few days to finish, and to look at Kunth’s[119] herbarium, with which I was rather disappointed. Kunth was extremely polite and attentive to me. He is at work upon the third volume of his “Enumeratio,” but I fear it will not be very well done. I saw Ehrenberg[120] frequently, and Link[121] once or twice, but nearly all my time was spent at Schönberg, where the Botanic Garden and Herbarium are situated, which is nearly a half hour’s ride from the city. The garden is much the finest in Germany, and the government annually expends very large sums upon it. The building exclusively devoted to the herbarium is very commodious, though Klotzsch begins to complain that he has not sufficient room. It is so far from town that there are no loungers there, and one may study perfectly undisturbed. I brought a few things for you from Klotzsch and Link, which Pamphlin is to send to-morrow. Having lost some time by illness I did not go to Rostock, a most out-of-the-world place, although I suppose I shall hereafter regret that I did not see Lamarck’s herbarium. I spent several days at Hamburg, saw Lehmann, his herbarium, and the botanic garden; and took steamboat for London. Since my return I have been busily occupied in the city, completing some purchases for the Michigan University, and shall be mostly thus employed during the remainder of my stay.... 19th September.--I saw Dr. Richardson the day before yesterday, who informed me that the Erebus was still lying at Chatham, and (what I was not aware of) that I could reach Chatham in three or four hours. So I arranged at once to go down and see Joseph before he started, but the next day I learned that the vessels had dropped down from that port. I expect to sail in the Toronto from Portsmouth on the 1st October.... I have yet very much to do. Yesterday I dined with Dr. Lindley and visited the Garden. One wing of the conservatory is erected and nearly covered with glass. It is entirely glass and iron, about 130 feet long, and will be very fine.... Believe me, my very dear friend, most truly yours, A. GRAY. NEW YORK, 5th November, 1839.