George had been at Down from 11 to 13 November 1881 (Emma Darwin’s diary (DAR 242) and letter from Emma Darwin to George Howard Darwin, [16 November 1881] (DAR 210.3: 31)). The issue of Nature contained a lecture by Robert Stawell Ball praising George’s contribution to tidal theory: ‘The great theory itself is chiefly the work of one man. You are all familiar with the name he bears. The discoverer of tidal evolution is Mr G. H. Darwin, Fellow of Trinity College, Cambridge’ (Nature, 24 November 1881, p. 81). See also letter to G. H. Darwin, 8 June [1881].