At CD’s request HBD has traced the quotation; it is on regeneration from Charles White in W. B. Carpenter’s Comparative physiology (1854), p. 480.

Is gratified that CD thinks some of the arguments in his book [Lectures on the germs of disease (1861)] are satisfactory.

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.

Sends copy of the table, which now embodies CD’s suggestions [see 4117].

Gives instances of persons born with two thumbs and comments on hereditary factor.