-garden, and I have often been struck how extremely pretty
and strange the flower garden and surrounding bushes appear when thus
viewed. Your letter will be very useful to me for a new edition of my
Expression book; but this will not be for a long time, if ever, as the
publisher was misled by the very large sale at first, and printed far
too many copies.

I daresay you intend to publish your views in some essay, and I think
you ought to do so, for you might make an interesting and instructive
discussion.

I have been half killing myself of late with microscopical work on
plants. I begin to think that they are more wonderful than animals.

P.S., January 29th, 1875.--You will see that by a stupid mistake in
the address this letter has just been returned to me. It is by no
means worth forwarding, but I cannot bear that you should think me
so ungracious and ungrateful as not to have thanked you for your long
letter.

As I forget whether "Cambridge" is sufficient address, I will send this
through Asa Gray.

(PLATE: CHARLES LYELL. Engraved by G.I. (J). Stodart from a photograph.)

CHAPTER 2.IX. GEOLOGY, 1840-1882.

I. Vulcanicity and Earth-movements.--II. Ice-action.--III. The Parallel
Roads of Glen Roy.--IV. Coral Reefs, Fossil and Recent.--V. Cleavage
and Foliation.--VI. Age of the World.--VII. Geological Action of
Earthworms.--VIII. Miscellaneous.

2.IX.I. VULCANICITY AND EARTH-MOVEMENTS, 1840-1881.

LETTER 479. TO DAVID MILNE. 12, Upper Gower Street, Thursday [March]
20th [1840].

I much regret that I am unable to give you any information of the kind
you desire. You must have misunderstood Mr. Lyell concerning the object
of my paper. (479/1. "On the Connexion of certain Volcanic Phenomena,
and on the Formation of Mountain-chains and the Effects of Continental
Elevations." "Trans. Geol. Soc." Volume V., 1840, pages 601-32 [March
7th, 1838].) It is an account of the shock of February, 1835, in Chile,
which is particularly interesting, as it ties most closely together
volcanic eruptions and continental elevations. In that paper I notice a
very remarkable coincidence in volcanic eruptions in S. America at very
distant places. I have also drawn up some short tables showing, as
it appears to me, that there are periods of unusually great volcanic
activity affecting large portions of S. America. I have no record of any
coincidences between shocks there and in Europe. Humboldt, by his table
in the "Pers. N