I shall be in Germany in August, and am extremely desirous of permission to call upon you, more especially as I have in the press an article on General Morphology for the next volume of the Encyclopaedia Britannica, and am anxious to submit at least the sections on Individuality, Pro-morphology &c to your valued criticism. If I am not taking too great a liberty; may I ask you therefore to inform me whether I may have the honour of a short interview, either at Jena or elsewhere, early in August?