130 LIFE OF SIR JOHN LUBBOCK or. 



The following letter contains Darwin's comments 

 after the perusal of the proof sheets : 



Haredene Alhury, Guildford, 

 August 12, 1871. 



My dear Lubbock — You will see where we are, and 

 where we remain for 3 weeks more. 



I hope the proof sheets having been sent here will not 

 inconvenience you. I have read them with infinite 

 satisfaction, and the whole discussion strikes me as 

 admirable. I have no books here, and wish much I 

 could see a plate of Campodea. I never reflected much 

 on the difficulty which you indicate, and on which you 

 throw so much light. 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 develop- 

 mental and adaptive changes ; for I cannot quite re- 

 member the point, and others will perhaps be in the same 

 predicament. I think I always saw that the larva and 

 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 ; not that I in the least doubt the value of your 

 explanation. Cirripedes, passing through what I have 

 called a pupal state, as far as their mouths are concerned, 

 rather supports what you say at p. 52. 



At p. 40 your 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 faculties. 

 If you can spare me these proof sheets when done 

 with, I should be obliged, as I am correcting a new 

 Edition of the Origin when I return home, tho' this 

 subject is too large for me to enter into. 



I thank you sincerely for the great interest which 

 your discussion has given me, and with thanks for your 

 congratulations on an event that gives us great satis- 

 faction. — Believe me, yours very sincerely, 



Ch. Darwin. 

 I return by this post the sheets. 



He found time, moreover, to look abroad, 



