{523} This sentence occurs in an almost identical form in the _Origin_, Ed. i. p. 490, vi. p. 669. It will be noted that man is not named though clearly referred to. Elsewhere (_Origin_, Ed. i. p. 488) the author is bolder and writes "Light will be thrown on the origin of man and his history." In Ed. vi. p. 668, he writes "Much light &c." {524} For the history of this sentence (with which the _Origin of Species_ closes) see the Essay of 1842, p. 52, note 2{Note 184}: also the concluding pages of the Introduction. {525} These four words are added in pencil between the lines. INDEX For the names of Authors, Birds, Mammals (including names of classes) and Plants, see sub-indexes under _Authors_, _Birds_, _Mammals_ and _Plants_. Acquired characters, _see_ Characters Affinities and classification, 35 America, fossils, 177 Analogy, resemblance by, 36, 82, 199, 205, 211 Animals, marine, preservation of as fossils, 25, 139, 141; --marine distribution, 155, 196 Australia, fossils, 177 AUTHORS, NAMES OF:--Ackerman on hybrids, 11; Bakewell, 9, 91; Bateson, W., xxix, 69 _n._, 217; Bellinghausen, 124; Boitard and Corbie, 106 _n._; Brougham, Lord, 17, 117; Brown, R., 233; Buckland on fossils, 24, 137, 145 _n._; Buffon on woodpecker, 6; Bunbury (_Sir_ H.), rules for selection, 67; Butler, S., 116 _n._; d'Archiac, 146 _n._; Darwin, C., origin of his evolutionary views, xi-xv; --on Forbes' theory, 30; --his _Journal of Researches_ quoted, 67 _n._, 168 _n._; --his _Cross-and Self-Fertilisation_, 69 _n._, 103 _n._; --on crossing Chinese and common goose, 72 _n._; Darwin, Mrs, letter to, xxvi; Darwin, F., on Knight's Law, 70 _n._; Darwin, R. W., fact supplied by, 42 _n._, 223; Darwin and Wallace, joint paper by, xxiv, 87 _n._; De Candolle, 7, 47, 87, 204, 238; D'Orbigny, 124, 179 _n._; Ehrenberg, 146 _n._; Ewart on telegony, 108 _n._; Falconer, 167; Forbes, E., xxvii, 30, 146 _n._, 163 _n._, 165 _n._; Gadow, Dr, xxix; Gaertner, 98, 107; Goebel on Knight's Law, 70 _n._; Gould on distribution, 156; Gray, Asa, letter to, publication of in Linnean paper explained, xxiv; Henslow, G., on evolution without selection, 63 _n._; Henslow, J. S., xxvii; Herbert on hybrids, 12, 98; --sterility of crocus, 99 _n._; Hering, 116 _n._; Hogg, 115 _n._; Holland, Dr, 223; Hooker, J. D., xxvii, xxviii, 153 _n._; --on Insular Floras, 161, 164, 167; Huber, P., 118; Hudson on woodpecker, 131 _n._; Humboldt, 71, 166; Hunter, W., 114; Hutton, 27, 138; Huxley, 134 _n._; --on Darwin, xi, xii, xiv; --on Darwin's Essay of 1844, xxviii, 235; Judd, xi, xiii, xxix, 28, 141 _n._; Knight, A., 3 _n._, 65, 114; --on Domestication, 77; Knight-Darwin Law, 70 _n._; Koelreuter, 12, 97, 98, 104, 232;