310 THE 'ORIGIN OF SPECIES.' [l86o. 



. . . Agassiz sends me a personal civil message, but inces- 

 santly attacks me ; but Asa Gray fights like a hero in defence. 

 Lyell keeps as firm as a tower, and this autumn will publish 

 on the ' Geological History of Man,' and will then declare 

 his conversion, which now is universally known. I hope that 

 you have received Hooker's splendid essay. . . . Yesterday 

 I heard from Lyell that a German, Dr. Schaaffhausen,* has 

 sent him a pamphlet published some years ago, in which the 

 same view is nearly anticipated ; but I have not yet seen this 

 pamphlet. My brother, who is a very sagacious man, always 

 said, " you will find that some one will have been before you." 

 I am at work at my larger work, which I shall publish in a 

 separate volume. But from ill-health and swarms of letters, 

 I get on very very slowly. I hope that I shall not have 

 wearied you with these details. With sincere thanks for your 

 letter, and with most deeply felt wishes for your success in 

 science, and in every way, believe me, 



Your sincere well-wisher, 



C. DARWIX. 



C. Darwin to Asa Gray. 



Down, May 22nd [1860]. 



MY DEAR GRAY, Again I have to thank you for one of 

 your very pleasant letters of May /th, enclosing a very plea- 

 sant remittance of 22. I am in simple truth astonished at all 

 the kind trouble you have taken for me. I return Appletons' 

 account. For the chance of your wishing for a formal acknow- 

 ledgement I send one. If you have any further communi- 

 cation to the Appletons, pray express my acknowledgement 

 for [their] generosity ; for it is generosity in my opinion. I 

 am not at all surprised at the sale diminishing ; my extreme 



* Hermann Schaaffhausen 'Ueber Vereins, Bonn, 1853. See 

 Bestandigkeit und Umwandlur.g Historical Sketch, 

 der Arten.' Verhandl. d. Naturhist. 



