Thanks AdeC for his long letter full of interesting facts, which will be of great use if a new edition [of Variation] is demanded.
As for when CD will publish on variation in a state of nature: he has had the MS almost ready for several years but Variation fatigued him so much
that "I determined to amuse myself by publishing a short essay on the Descent of Man".
AdeC will have plenty of time to publish his views. Asks permission to quote AdeC on a case of inheritance of scalp-muscles [see Descent 1: 20].
Hooker has expressed a view, similar to AdeC’s, "that morals & politics would be very interesting if discussed like any branch of Natural History".
Agrees with AdeC on acclimatisation
and on graft-hybrids.
CD is repeating Hildebrand’s method in producing graft-hybrid potatoes.
As for Pangenesis, very few people approve of it though it has some enthusiastic friends and CD has much faith in its vitality.