When you know, I hope to be forgiven for keeping you so long in the dark. I have kept it a secret from papa too, though in his last letter he asks me what is my especial work just now. A few months more of patience, and I will give you a strict account of my time since I came here, and then I am sure you will be satisfied with me. I only wish to guard against one thing: do not take it into your head that I am about to don the fool's cap suddenly and surprise you with a Doctor's degree; that would be going a little too fast, nor do I think of it yet. . .I want to remind you not to let the summer pass without getting me fishes according to the list in my last letter, which I hope you have not mislaid. You would give me great pleasure by sending them as soon as possible. Let me tell you why. M. Cuvier has announced the publication of a complete work on all the known fishes, and in the prospectus he calls on such naturalists as occupy themselves with ichthyology to send him the fishes of the country where they live; he mentions those who have already sent him collections, and promises duplicates from the Paris Museum to those who will send him more. He names the countries also from which he has received contributions, and regrets that he has nothing from Bavaria. Now I possess several specimens of all the native species, and have even discovered some ten not hitherto known to occur here, beside one completely new to science, which I have named Cyprinus uranoscopus on account of the position of the eyes, placed on the top instead of the sides of the head,--otherwise very like the gudgeon. I have therefore thought I could not better launch myself in the scientific world than by sending Cuvier my fishes with the observations I have made on their natural history. To these I should like to add such rare Swiss species as you can procure for me. So do not fail. FROM HIS BROTHER. NEUCHATEL, August 25, 1828. . . .I received in good time, and with infinite delight, your pleasant letter of July 27th. Its mysteries have however been unveiled by Dr. Schinz, who came to the meeting of the Natural History Society in Lausanne, where he met papa and my uncle, to whom he pronounced the most solemn eulogiums on their son and nephew, telling them at the same time what was chiefly occupying you now. I congratulate you, my dear brother, but I confess that among us all I am the least surprised, for my presentiments about you outrun all this, and I hope soon to see them realized. In all frankness I can assure you that the stoutest antagonists of your natural history schemes begin to come over to your side. Among them is my uncle here, who never speaks of you now but with enthusiasm. What more can be said? I gave him your letter to read, and since then he has asked me a dozen times at least if I had not forgotten to forward the remittance you asked for, saying that I must not delay it. The truth is, I have deferred writing till the last moment, because I have not succeeded in getting your fishes, and