. . .I have also a piece of good news to communicate, which will, I hope, lead to very favorable results for me. I think I told you when I left for Paris that my chief anxiety was lest I might not be allowed to examine, and still less to describe, the fossil fishes and their skeletons in the Museum. Knowing that Cuvier intended to write a work on this subject, I supposed that he would reserve these specimens for himself. I half thought he might, on seeing my work so far advanced, propose to me to finish it jointly with him, --but even this I hardly dared to hope. It was on this account, with the view of increasing my materials and having thereby a better chance of success with M. Cuvier, that I desired so earnestly to stop at Strasbourg and Carlsruhe, where I knew specimens were to be seen which would have a direct bearing on my aim. The result has far surpassed my expectation.