To avoid possible misundertanding of his letter  of that morning, CD wishes to make clear that he did not wish to imply that BP's essay and the Vestiges of creation were in the same class. The more he thinks of it the more difficult he feels it would be to give a fair account of the authors who have maintained the modification of species. CD finds that he referred to BP's views in the preface to his larger work [Natural selection], which was replaced by the Origin.
Down Bromley Kent
My dear Sir
Thinking over my letter addressed to Athenæum Club to you this morning, as far as I can remember it, it has just occurred to me that you
might misunderstand one passage; & though I do not suppose that you would care
much for my opinion, I sh
The more I think of the whole subject the more difficult I feel it would be to give a fair account of the several authors who have maintained on various grounds the modification of species.— I beg pardon for troubling you with this second note & remain
My dear Sir | Yours sincerely | Charles Darwin
Haldeman is name of American Author forgotten this morning.
I have just bethought me of a Preface which I wrote to my larger work, before I broke down & was persuaded to write the now published Abstract. In this Preface I find following passage, which on my honour I had as completely forgotten as if I had never written it. ``The ''Philosophy of Creation`` has lately been treated in an admirable manner by the Revd. Baden Powell in his Essay &c &c 1855. Nothing can be more striking than the manner in which he shows that the introduction of new species is ''a regular not a casual phenomenon``, or as Sir John Herschel expresses it ''a natural in contradistinction to a miraculous process``.''
- f1 2655.f1See preceding letter.
- f2 2655.f2For a survey of the responses to [Chambers] 1844, see Secord 1989.
- f3 2655.f3Charles Lyell reminded CD about Samuel Steman Haldeman's paper (Haldeman 1843--4) in June 1859 (see Correspondence vol. 7, letter to Charles Lyell, 21 June ). CD included Haldeman among those who had previously discussed the species question in the `historical sketch' prepared as a preface for the American edition of Origin. See Appendix IV.
- f4 2655.f4CD refers to the manuscript on species that he wrote between 1856 and 1858 (Natural selection), from which Origin was largely compiled. The preface has not been preserved.
- f5 2655.f5The quotation is taken from Powell 1855, p. 359.
- f6 2655.f6John Frederick William Herschel's remark was printed in Babbage 1837, p. 204. CD included this statement in his historical sketch (see Appendix IV).