To J. D. Hooker 15 March 
Down Bromley Kent.
My dear Hooker
I am pleased at what you say of my Ch.—1 You have not attacked it nearly so much as I feared you would. You do not seem to have detected many errors.— It was nearly all written from memory, & hence I was particularly fearful; it would have been better, if the whole had first been carefully written out, & abstracted afterwards.2
I look at it as morally certain that it must include much error in some of its general views.— I will just run over a few points in your note; but do not trouble yourself to reply, without you have something important to say.—
I grieve to say that I feel compelled to disbelieve in the Lyellian view that Glacial Epoch is connected with position of continents:3 I have not thought myself compelled to say anything on this head, more than on cause of heat at Melville Isd in Carboniferous period:4 I think we know nothing on subject.—
I do not feel quite sure of entire revolution of continents & seas even during Chalk Period: the shores of Chalk Sea in Europe can be partly traced.
I do not see why the exclusively Australian forms could not have been manufactured in Australia: you must have here some meaning which I cannot fathom. I quite agree how strange that no Australian forms got to Europe: but I do not see why most Australian plants shd have been pushed into the sea.5
Many Thanks for caution about seeds of Trees: I was quoting by memory from A. De Candolle.— I will strike out passage.—6
About Cryptogamic plants, & physical conditions I cannot remember anything on the checks to their increase, ie on their general relations of life.—7
I daresay you will make excellent use of “wet & dry” in distribution: it is beyond my tether.
I shall be very curious to see your Essay.8
I shd like to know whether the case of Endemic Bats in Islands struck you: it has me especially; perhaps too strongly.9
With hearty thanks | Ever yours | C. Darwin
You cannot tell what a relief it has been to me, your looking over this chapter, as I felt very shaky on it.—
I shall tomorrow finish my last chapter, (except a Recapitulation) on Affinities, Homologies, Embryology &c & the facts seem to me to come out very strong for mutability of species.— I have been much interested in working out this chapter. I shall now, thank God, begin looking over old first chapters for press.—10 But my health is now so very poor, that even this will take me long.—
Will finish last chapter (except recapitulation) tomorrow.
Pleased with JDH’s response to geographical distribution chapter;
CD disagrees with Lyell’s view that glacial epoch is connected with position of continents.
Please cite as
Darwin Correspondence Project, “Letter no. 2432,” accessed on 27 October 2016, http://www.darwinproject.ac.uk/DCP-LETT-2432