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To William Main   29 November [1872]


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.

Author:  Charles Robert Darwin
Addressee:  William Main
Date:  29 Nov [1872]
Classmark:  Wellcome Collection (MS.7781/1–32 item 10)
Letter no:  DCP-LETT-8654

From William Main   26 November 1872


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.

Author:  William Main
Addressee:  Charles Robert Darwin
Date:  26 Nov 1872
Classmark:  DAR 171: 27
Letter no:  DCP-LETT-8648

From William Main   2 April 1873


Having now read Expression, WM repeats his criticism of "antithesis". Explains his theory of up-and-down-tending lines.

Author:  William Main
Addressee:  Charles Robert Darwin
Date:  2 Apr 1873
Classmark:  DAR 171: 28
Letter no:  DCP-LETT-8836
Document type
letter (3)
Darwin, C. R.[X]
Main, William[X]
1872 (2)
1873 (1)