[{518}] This sentence corresponds, not to the final section of the Origin, Ed. i. p. 484, vi. p. 664, but rather to the opening words of the section already referred to (Origin, Ed. i. p. 480, vi. p. 657).
[{519}] This simile occurs in the Essay of 1842, p. [50], and in the Origin, Ed. i. p. 485, vi. p. 665, i.e. in the final section of Ch. XIV (vi. Ch. XV). In the MS. there is some erasure in pencil of which I have taken no notice.
[{520}] An almost identical sentence occurs in the Origin, Ed. i. p. 487, vi. p. 667. The fine prophecy (in the Origin, Ed. i. p. 486, vi. p. 666) on “the almost untrodden field of inquiry” is wanting in the present Essay.
[{521}] See the last paragraph on p. 488 of the Origin, Ed. i., vi. p. 668.
[{522}] A passage corresponding to this occurs in the sketch of 1842, p. [51], but not in the last chapter of the Origin.
[{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]: also the concluding pages of the [Introduction].
[{525}] These four words are added in pencil between the lines.
CAMBRIDGE: PRINTED BY JOHN CLAY, M.A. AT THE UNIVERSITY PRESS