To John Phillips1 [November 1840]
I enclose you a copy of my paper on Earthquakes.—2 I have grown older, since I wrote it, & therefore, I hope, a little wiser, & as a consequence set less value on theoretical reasoning in geology—but I even yet think there is some weight in the argument, respecting the necessary slow elevation of mountain chains, which have protuberant axes of Plutonic rock.— Should you read my paper, & have at any future time, (although I well know how much your time must be occupied) leisure to tell me what you think of it, I should feel very great interest in hearing from you—
Believe me my dear Sir | Your’s most truly | Chas. Darwin
Sends his paper on earthquakes [(1840), Collected papers 1: 53–86]. Now sets less value on theoretical reasoning in geology than when he wrote it.
Please cite as
Darwin Correspondence Project, “Letter no. 578,” accessed on 3 December 2016, http://www.darwinproject.ac.uk/DCP-LETT-578