To Charles Lyell 22 May 
Down Bromley Kent
My dear Lyell
Perhaps you wd. like see another of A. Gray’s letter received this morning. The Appletons are gentlemen, though payment not large.— The Edition was 2500 of the Origin, & I am far from surprised that sale slackens.—1
I send by this Post Isidore G. H. on Hare-rabbit p. 222:2 you can send it afterwards to my Brothers. I have not yet seen N. British; though I have copy at my Brothers, & am very glad to know who is Author.—3 I hear that it is very savage.—
The Medical Review referred to by Asa Gray is only that (I now find from Williams & Norgate) which Carpenter wrote in Medical & Chirurg. Review;4 it is at my Brothers & you can take it, if you have not already seen it.—
I am sorry that I troubled you with Sedgwick in Cambridge paper.—5
Hooker has sent me letter of Thwaites of Ceylon, who makes exactly same objection which you did at first about the necessity of all forms advancing & therefore the difficulty of simple forms still existing.6 There was no worse omission than this in my Book & I had discussion all ready. I am extremely glad to hear that you intend adding new argument about imperfection of Geological Record:7 I always feel this acutely & am surprised that such men as Ramsay & Jukes do not feel it more.—8 I quite agree no sufficient evidence about Mummy wheat.9
When you can spare it, I shd. like (but out of mere curiosity) to see Binney on coal-marine marshes:10 I once made Hooker very savage by saying that I believed Coal-plants grew in sea like mangroves.—11
Etty keeps nearly the same, but rather improves: it is now more than 3 weeks.— We have just moved her to fresh room for change.—
I have much to write, so goodBye | Yours affect. | C. Darwin
What a fact about the Coal Land Shells!!!12
Mentions American edition of Origin.
A "savage" review [by John Duns] in North British Review [32 (1860): 455–68].
Comments on views of G. H. K. Thwaites on the survival of simple forms as a problem in his theory.
Mentions imperfection of geological record.
Marine origin of coal.
Illness of Etty.
Encloses article by Isidore Geoffroy Saint-Hilaire on hare–rabbit crosses [Histoire naturelle générale (1854–62) 3: 222].