you. I had intended being in London to-morrow, but one of my principal
plagues will, I believe, stop me; if I do I will assuredly call on you. I
have not yet read Mr. Milne on Elevation (522/11. "On a Remarkable
Oscillation of the Sea, observed at Various Places on the Coasts of Great
Britain in the First Week of July, 1843." "Trans. R. Soc. Edinb." Volume
XV., page 609, 1844.), so will keep his paper for a day or two.

P.S.--As you cannot want this letter, I wish you would return it to me, as
it will serve as a memorandum for me. Possibly I shall write to Mr.
Chambers, though I do not know whether he will care about what I think on
the subject. This letter is too long and ill-written for Sir J. Clark.


LETTER 523. TO LADY LYELL.
[October 4th, 1847.]

I enclose a letter from Chambers, which has pleased me very much (which
please return), but I cannot feel quite so sure as he does. If the
Lochaber and Tweed roads really turn out exactly on a level, the sea theory
is proved. What a magnificent proof of equality of elevation, which does
not surprise me much; but I fear I see cause of doubt, for as far as I
remember there are numerous terraces, near Galashiels, with small intervals
of height, so that the coincidence of height might be cooked. Chambers
does not seem aware of one very striking coincidence, viz., that I made by
careful measurement my Kilfinnin terrace 1202 feet above sea, and now Glen
Gluoy is 1203 feet, according to the recent more careful measurements.
Even Agassiz (523/1. "On the Glacial Theory," by Louis Agassiz, "Edinb.
New Phil. Journ." Volume XXXIII., page 217, 1842. The parallel terraces
are dealt with by Agassiz, pages 236 et seq.) would be puzzled to block up
Glen Gluoy and Kilfinnin by the same glacier, and then, moreover, the lake