Sends CD a form he has devised of a proper genealogical table of three or four generations of the families of medical cases, so that hereditary transmission may be more accurately and fully recorded.

CD thinks HBD’s tables would be a considerable gain because "the importance of hereditary transmission can hardly be exaggerated from every point of view". Makes suggestions.

Asks him to send any remarkable cases of inheritance to him and, as well, any case of regrowth of amputated additional digit.