I, too, have considered the question about Dinkel, and if, when I have finished my work here, my position is not changed, and I have no definite prospect, such as would justify me in keeping him with me,--well! then we must part! I have long been preparing myself for this, by employing him only upon what is indispensable to the publication of my first numbers, hoping that these may procure me the means of paying for such illustrations as I shall further need. As my justification for having engaged him in the first instance, and continued this expense till now, I can truly say that it is in a great degree through his drawings that M. Cuvier has been able to judge of my work, and so has been led to make a surrender of all his materials in my favor. I foresaw clearly that this was my only chance of competing with him, and it was not without reason that I insisted so strongly on having Dinkel with me in passing through Strasbourg and subsequently at Carlsruhe. Had I not done so, M. Cuvier might still be in advance of me. Now my mind is at rest on this score; I have already written you all about his kindness in offering me the work. Could I only be equally fortunate in its publication! M. Cuvier urges me strongly to present my book to the Academy, in order to obtain a report upon its contents. I must first finish it, however, and the task is not a light one. For this reason, above all, I regret my want of means; but for that I could have the drawings made at once, and the Academy report, considered as a recommendation, would certainly help on the publication greatly. But in this respect I have long been straitened; Auguste knows that I had at Munich an artist who was to complete what I had left there for execution, and that I stopped his work on leaving Concise. If the stagnation of the book-trade continues I shall, perhaps, be forced to give up Dinkel also; for if I cannot begin the publication, which will, I hope, bring me some return, I must cease to accumulate material in advance. Should business revive soon, however, I may yet have the pleasure of seeing all completed before I leave Paris. I think I forgot to mention the arrival of Braun six weeks after me. I had a double pleasure in his coming, for he brought with him his younger brother, a charming fellow, and a distinguished pupil of the polytechnic school of Carlsruhe. He means to be a mining engineer, and comes to study such collections at Paris as are connected with this branch. You cannot imagine what happiness and comfort I have in my relations with Alexander; he is so good, so cultivated and high-minded, that his friendship is a real blessing to me. We both feel very much our separation from the elder Schimper, who, spite of his great desire to join us at Carlsruhe and accompany us to Paris, was not able to leave Munich. . .