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The Charles Darwin Collection
The Darwin Correspondence Project is publishing letters written by and to the naturalist Charles Darwin (1809–1882). Complete transcripts of letters are being made available through the Project’s website (www.darwinproject.ac.uk) after publication in the ongoing print edition of The Correspondence of Charles Darwin (Cambridge University Press 1985–). Metadata and summaries of all known letters (c. 15,000) appear in Ɛpsilon, and the full texts of available letters can also be searched, with links to the full texts.
Thanks WM for his letter. CD does not think WM’s principle of [up-tending and down-tending] lines explains the cases of expression of emotions referred to, and, even if it did, the problem would remain as to why the lines should express what WM believes they do.
Has read a review of Expression and finds CD’s explanation of "antithesis" [see Expression, p. 50] unsatisfactory. Proposes a theory of upward lines expressing energy and downward lines expressing the reverse.
Having now read Expression, WM repeats his criticism of "antithesis". Explains his theory of up-and-down-tending lines.