266 LETTERS PROM C. DARWIN, ESQ., 



forgotten ; but I see all are attached to a most rugged surface. 

 If yours happens to be attached to anything smooth, and you 

 could spare the lase of the peduncle still attached, I should be 

 very much obliged. 



No. 11. 

 (June 22nd, 1851, by A. H.) 



Down Famborough, Kent, 



June 22nd. 

 My dear Sir, 



I write merely to thank you very much for your assist- 

 ance regarding the book, and to request you to especially thank 

 Mr. Alder when you see him for his kindness. I am much ob- 

 liged for the offer of the Iblas, but being on a rugged support I 

 do not think they would aid me. 



Pray believe me, yours sincerely, 



C. Darwin. 



You can return the MS. whenever you like, but I should be 

 sorry to lose the pages, though of no value. 



'^0. 12. 

 • (25th Dec, 1852, by A. H.) 



Down Farnborough, Kent, 



Dec. 25th. 

 My dear Sir, 



You will probably remember that you called my atten- 

 tion to the following facts, that Yerruca (= Clisia, etc.) (1st) 

 has the power of excavating a slight depression for itself ; but 

 that (2nd) epidermis on a shell quite stops this process; and 

 (3rd) that under its middle there is sometimes a hollow, some- 

 times with chalky matter. I have just been at work on the 



