Huggins, Sir W., and psychical research, ii. 198, 199

Hughes, Hugh Price, Wallace’s opinion of, ii. 204

——­ letter from, on Wallace’s “Justice, not Charity,” ii. 157

Humboldt’s “Personal Narrative,” i. 17, 164, 238

Humming-birds, ii. 23, 24

Huxley, T.H., i. 1, 5, 76, 116, 137;
  meets Wallace, 35;
  appreciation of Wallace, 94;
  first interview with Darwin, 104;
  and Herbert Spencer, 123;
  and the memorial to Gladstone as to a pension for Wallace, 313;
  and psychical research, ii. 198;
  opinion as to Wallace joining Royal Society, 220;
  on Henslow, 251

——­ letters from, declining Wallace’s invitation to investigate
  “curious phenomena,” ii. 187-8

Hybrids, sterility of, i. 130, 195 et seq.;
  and Natural Selection, 195 et seq.;
  infertility of, 297

Hyder, Mr. J., ii. 161, 252

Hyndman, Mr. H.M., letter from, acknowledging Wallace’s birthday congratulations, ii. 164

I

“Ice-Marks in North Wales,” Wallace’s, i. 177

“Illustrations of British Insects,” i. 23 (note)

“Immigration of Norwegian Flora,” Blytt’s, i. 293

Immortality, Wallace’s views on, ii. 176

Indian Mutiny, i. 68

Indians, American, Bates’s opinion of, ii. 29

Individual adaptability and natural selection, ii. 55

“Insectivorous Plants,” Darwin’s, i. 284, 285, ii. 2

Insects, migration of, Lyell on, ii. 19;
  theory of flight, 26

Instinct, Archdall Reid’s views of, ii. 67

“——­ in Man and Animals,” Wallace’s, ii. 6

“Introduction to Study of Natural Philosophy,” Herschel’s, i. 17

“Is Mars Habitable?” Wallace’s, ii. 172

“Island Life,” Wallace’s, i. 42, 305, 306-7, ii. 5, 12-14, 32, 33, 72, 75

Islands, continental, i. 305, ii. 12

——­ oceanic, i. 138, 210-12, 305, ii. 12

J

Jameson’s lectures on geology and zoology in Edinburgh, i. 16

Janet’s “Materialism of the Present Day,” i. 170, 172, 173, 175

Jardine, Sir W., criticism of “Origin of Species,” i. 142

Java, birds of, i. 87;
  flora of, 86;
  mountains of, 85-6;
  volcanoes of, 85, 86

Jencken, Mrs., ii. 198

Jenkin, Fleeming, on limitations to variation, i. 190;
  Darwin on, 233, 234;
  Wallace on, 234

Jensen and De Rougemont, ii. 76

Jessopp, Rev. Augustus, letter on land nationalisation, ii. 157

Joan of Arc, works on, ii. 204

Jones, Sir Rupert, on Miocene or Old Pliocene Man in India, ii. 62

——­ Mr. W. Braunston, birthday ode by, ii. 248

Jordan, Mr., ii. 129

Josiah Mason College, Birmingham, Wallace and, i. 306