that forms successively produced necessarily
endure for corresponding lengths of time. A very ancient form might
occasionally last much longer than a form elsewhere subsequently
produced, especially in the case of terrestrial productions inhabiting
separated districts" (pages 334-5). The same words occur in the
later edition of the "Origin" (Edition VI., page 306.) All these new
discoveries show how imperfect the discovered series is, which Falconer
thought years ago was nearly perfect.

I will send to-day or to-morrow two articles by Asa Gray. The longer
one (now not finally corrected) will come out in the October "Atlantic
Monthly," and they can be got at Trubner's. Hearty thanks for all your
kindness.

Do not hurry over Asa Gray. He strikes me as one of the best reasoners
and writers I ever read. He knows my book as well as I do myself.

LETTER 113. TO C. LYELL. 15, Marine Parade, Eastbourne, October 3rd
[1860].

Your last letter has interested me much in many ways.

I enclose a letter of Wyman's which touches on brains. Wyman is mistaken
in supposing that I did not know that the Cave-rat was an American form;
I made special enquiries. He does not know that the eye of the Tucotuco
was carefully dissected.

With respect to reviews by A. Gray. I thought of sending the Dialogue
to the "Saturday Review" in a week's time or so, as they have lately
discussed Design. (113/1. "Discussion between two Readers of Darwin's
Treatise on the Origin of Species, upon its Natural Theology" ("Amer.
Journ. Sci." Volume XXX, page 226, 1860). Reprinted in "Darwiniana,"
1876, page 62. The article begins with the following question: "First
Reader--Is Darwin's theory atheistic or pantheistic? Or does it tend to
atheism or pantheism?" The discussion is closed by the Second Reader,
who thus sums up his views: "Wherefore we may insist that, for all
that yet appears, the argument for design, as presented by the natural
theologians, is just as good now, if we accept Darwin's theory, as it
was before the theory was promulgated; and that the sceptical juryman,
who was about to join the other eleven in an unanimous verdict in favour
of design, finds no good excuse for keeping the Court longer waiting.")
I have sent the second, or August, "Atlantic" article to the "Annals and
Mag. of Nat. History." (113/2. "Annals and Mag. Nat. Hist." Volume VI.,
pages 373-86, 1860. (From the "Atlantic Monthly," August, 1860.)) The
copy which you have I want