ossing Plants," 296;
on Darwin's "Orchids," 297;
on Darwin's "Forms of Flowers," and glacial theory, 298;
on sufficiency of Natural Selection, 300;
on Epping Forest superintendency, 302, 303;
on "Island Life," 305, 306;
on Darwin's criticism of "Island Life," 308;
on Darwin's "Movements of Plants," 311;
on land migration of plants, 311;
on Civil List pension, 314, 315;
on "Progress and Poverty," 317;
on Darwin's "Earthworms," 320

---- ---- ---- letters to Sir Francis Darwin:
on Darwin's "Life and Letters," ii. 39;
on descent with modification, 78;
on mutation, 80

---- ---- ---- letter to Mr. W.J. Farmer, on final cause of varying
colour of hairs, etc., ii. 101-2

---- ---- ---- letter to Dr. W.B. Hemsley, on insular floras, ii. 43-4

---- ---- ---- letter to Rev. J.B. Henderson, on Christianity, ii. 209

---- ---- ---- letter to Sir J. Hooker, on Natural Selection, etc.,
ii. 81-2

---- ---- ---- letters to Huxley:
enclosing a copy of "The Scientific Aspect of the Supernatural," ii. 187;
on psychical research, 188

---- ---- ---- letter to Mr. J. Hyder, on land nationalisation, ii. 161

---- ---- ---- letter to Prof. Knight, on immortality, ii. 178

---- ---- ---- letter to Dr. Littledale, acknowledging birthday
congratulations, ii. 136

---- ---- ---- letters to Sir Oliver Lodge:
on proof of constant variability, and Lord Kelvin's calculations,
ii. 74-5;
on principle of continuity, etc., 178-9;
acknowledging Romanes' lecture and criticising lectures by Mr.
See, 179-80

---- ---- ---- letter to Sir C. Lyell, on colour of man, ii. 29

---- ---- ---- letters to Mr. J.W. Marshall:
on Hudson's observations and theories, ii. 53-4;
conveying condolences, and views on a hereafter, 209;
on his autobiography, 226

---- ---- ---- letters to Prof. Meldola:
on physiological selection, ii. 36-8;
on Natural Selection, 41, 42-3;
on Meldola's controversy with Romanes, 50-1;
on individual adaptability, 55-6;
on "discontinuous variation," 62-3;
on Weismann's "Germinal Selection," 68-70;
on Weismann's doctrine of non-inheritance of acquired characters, 70-1;
on Weismann's "Germ Plasm," 72;
on Fisher's "Physics of the Earth's Crust," 74;
on Meldola's offer to read Wallace's paper at Royal Institute, 87-8

---- ---- ---- letter to Mr. Ben. R. Miller, on Sleeper's "Shall we
have Common Sense?" ii. 98-9

---- ---- ---- letter to