_Idylls of the King_, Tennyson, v, 13. Ignorance and wisdom, Starr King on, vii, 308. Illegitimacy, xiv, 39; Marcus Aurelius on, viii, 133. Illinois, farmers' wives in, ii, 222; pioneer days in, iii, 280. Illumination of books, i, p xxv. _Illustrations of Political Economy_, Harriet Martineau, ii, 83. Illustrator and artist, difference between, iv, 329. _Il Penseroso_, Milton, v, 126, 137. _Il Pensiero_, Michelangelo, iv, 32. _Il Trovatore_, Verdi, xiv, 292. Imagination, iv, 332; v, 105, 240. Immortality, i, 247; x, 11; power and, vi, 57. Incandescent lamp, invention of, i, 329. Incompatibility, iv, 254; v, 129; vii, 68. Inconsistency, examples of, x, 366. Independence, vi, 332. Independence, Declaration of, iii, 75. Indians, Canada's treatment of, xi, 404; North American, in London, ix, 28; Washington's mission among, iii, 17. Indian, the American, xii, 141; as an orator, iii, 189. Indifference, vi, 325. Individuality, xiv, 43. Indulgences, vii, 123. Infant phenomenon, the, v, 122. _Inferno_, Dante, iv, 340. Infidelity, vi, 13; x, 342. Influence of women, i, 75. Ingalls, John J., quoted, vii, 177. Ingersoll, Ebon, brother of Robert Ingersoll, vii, 249; death of, vii, 235. Ingersoll, Robert G., xii, 251; birthplace of, vii, 242; parents of, vii, 237; wife of, vii, 259; his great achievement, vii, 268; mental evolution of, vii, 257; H. W. Beecher and, vii, 357; Peter Cooper and, xi, 259; the dictum of, viii, 173; Gladstone's reply to, x, 363; William Godwin compared with, xiii, 87; the Governor of Delaware and, ix, 261; Elbert Hubbard and, vii, 255; on Alexander von Humboldt, xii, 160; Huxley compared with, xii, 319; on love, vii, 232; lecture on the mistakes of Moses, x, 15; opinions regarding, vii, 253; compared with Paine and Bradlaugh, ix, 243; quoted, iii, 288; on Shakespeare, xii, 319. Initiative, xii, 242. _In Memoriam_, Tennyson, v, 82, 88. Innocent III, Pope, referred to, i, 151. _In Patience_, Christina Rossetti, ii, 114. _In Praise of Folly_, Erasmus, x, 177. Inquisition, the Spanish, vi, 171. Insanity, defined, i, 163; viii, 255; originality and, viii, 197. Inspiration, vi, 155. Instrumental music, v, 236. Insurance, a species of gambling, viii, 300. Intellect and beauty, x, 277. _Intellectual Life, The_, Hamerton, vi, 50. Intellectual tyranny, x, 348. Introspection, vii, 118. _Invocation_, Tennyson, v, 89. Iowa, farmers' wives in, ii, 222. Ireland, American travelers in, i, 155; beauty of, i, 274; Edmund Burke on, vii, 178; Parnell on, xiii, 174; Lord Dufferin on, xiii, 175; Gladstone on, xiii, 176; Henry George on, xiii, 190; Home Rule in, xiii, 199; the Irish and, xi, 335; lawlessness in, i, 277; women of, i, 275. Irish Church, the, i, 114. Irish immigration, xiii, 179. Iron, the consumption of, xi, 296. Ironsides, Cromwell's regiment, ix, 320. _Irreparableness_, E. B. Browning, ii, 16.