My dear Lubbock

You will see where we are, & where we remain for 3 weeks more.²

I hope the proof sheets having been sent here will not inconvenience you. I have read them with infinite satisfaction, & the whole discussion strikes me as admirable.³ I have no books here & wish much I c^d see a plate of Campodea. I never reflected much on the difficulty which you indicate, & on which you throw so much light.⁴ I have only a few trifling remarks to make. At p. 44. I wish you had enlarged a little on what you have said of the distinction between developmental & adaptive changes; for I cannot quite remember the point & others will perhaps be in the same predicament.⁵ I think I always saw that the larva & the adult might be separately modified to any extent. Bearing in mind what strange changes of function parts undergo with the intermediate states of use, it seems to me that you speak rather too boldly on the impossibility of a mandibulate insect being converted into a sucking insect;⁶ not that I in the least doubt the value of y^r explanation.

Cirrepedes passing through what I have called a pupal state, as far as their mouths are concerned, rather supports what you say at p. 52.⁷

At p. 40 y^r remarks on the Argus pheasant (tho’ I have not the least objection to them) do not seem to me very appropriate as being related to the mental faculties⁸

If you can spare me these proof sheets when done with I sh^d be obliged as I shall be correcting a new Ed. of the Origin when I return home, tho’ this subject is too large for me to enter on⁹

I thank you sincerely for the great interest which y^r discussion has given me, & with thanks for your congratulation on an event that gives us great satisfaction¹⁰ | believe me yours very since⁠⟨⁠rely⁠⟩⁠ | Ch. Darwin

I return by this Post, the sheets