Letter (ALS). Typescript of French original and typed English translation are available. Discusses the petrified fossils of Montmartre, Maestricht, and Euhstedt and the cetaceans at M. de Buffon's in Paris. Expresses disappointment at being unable to see Goethe, touching on the troubled internal political affairs of the Netherlands. Announces intention to make a short trip to Germany in the spring in order to visit Merck and Soemmerring.

Letter (ALS). Typescript of French original and typed English translation are available. Discusses the petrified fossils of Montmartre, Maestricht, and Euhstedt and the cetaceans at M. de Buffon's in Paris. Expresses disappointment at being unable to see Goethe, touching on the troubled internal political affairs of the Netherlands. Announces intention to make a short trip to Germany in the spring in order to visit Merck and Soemmerring.