The reference is to an article, ‘Feeling of beauty among the animals’, that appeared in the 24 November 1866 issue of the Athenæum (Shaw 1866b). CD cited the article in Descent 2: 71. For CD and Shaw’s earlier discussions on the subject of beauty in relation to natural selection, see the letters to James Shaw, 11 February [1866] and [23 or 30 April 1866], and the letters from James Shaw, [6–10 February 1866], 14 February 1866, 19 April 1866, and 7 November 1866; see also Correspondence vol. 13.