pended to my Alpine affair that I have taken the field against the extension of the Jura!
In a word, I do not believe that great trunk glaciers ever filled the valleys of the Rhone, etc. Perhaps you will be present at our next meeting of the British Association at Edinburgh, August, 1850. Olim meminisse juvabit! and then, my dear and valued and most enlightened friend, we may study once more together the surface of my native rocks for auld lang syne. . . .
From Charles Darwin. Down, Farnborough, Kent, June 15 [1850, probably].
my dear Sir,—I have seldom been more deeply gratified than by receiving your most kind present of Lake Superior.
I had heard of it, and had much wished to read it, but I confess it was the very great honor of having in my possession a work with your autograph, as a presentation copy, that has given me such lively and sincere pleasure.
I cordially thank you for it. I have begun to read it with uncommon interest, which I see will increase as I go on.