My dear Sir

Since I wrote a few days ago & sent off three copies of y^r book, I have read the English translation, & cannot deny myself the pleasure of once again expressing to you my warm admiration.¹ I might, but will not, repeat my thanks for the very honourable manner in which you often mention my name; but I can truly say that I look at the publication of y^r essay as one of the greatest honours ever conferred on me. Nothing can be more profound & striking than y^r observations on development & classification. I am very glad that you have added y^r justification in regard to the metamophoses of insects, for y^r conclusion now seems in the highest degree probable.² I have re-read many parts; especially that on cirripedes with the livliest interest. I had almost forgotten y^r discussion on the retrograde development of the Rhizocephala.³ What an admirable illustration it affords of my whole doctrines! A man must indeed be a bigot in favour of separate acts of creation, if he is not completely staggered after reading y^r essay; but I fear that it is too deep for English readers, except for a select few.

With cordial gratitude & respect believe me my dear Sir | yours truly | Charles Darwin