xxii OUTLINE OF CHARLES DARWIN'S LIFE 



1865. Jan. ist: Continued at work on Variation until April 



22nd. The work was interrupted by illness until 



late in the autumn. 



Feb. : Read paper on Climbing Plants. 

 Dec. 25th : Began again on Variation. 



1 866. Continued work at Variation under Domestication. 

 March ist to May loth : At work on Edit. iv. of the 



Origin. 



Published June (1250 copies). 

 Read paper on Cytisus scoparius to the Linnean 



Society. 

 Dec. 22nd : Began the last chapter of Variation under 



Domestication. 



1867. Nov. 1 5th: Finished revises of Variation under 



Domestication. 



Dec. : Began papers on Illegitimate Unions of Dimor- 

 phic and Trimorphic Plants, and on Primula. 



1868. Jan. 3Oth : Publication of Variation under Domestication. 

 Feb. 4th : Began work on Man. 



Feb. loth : New edition of Variation under Domesti- 

 cation. 



Read papers on Illegitimate Unions of Dimorphic and 

 Trimorphic Plants, and on Verbascum. 



1869. Feb. loth : "Finished fifth edition of Origin ; has 



taken me forty-six days." Edit. V. published in May. 

 Working at the Descent of Man. 

 Papers on the Fertilisation of Orchids, and on the 



Fertilisation of Winter-flowering Plants. 



1870. Working at the Descent of Man. 

 Paper on the Pampas Woodpecker. 



1871. Jan. 1 7th : Began the Expression of the Emotions. 

 Feb. 24th : Descent of Man published (2500 copies). 

 April 27th : Finished the rough copy of Expression. 

 June 1 8th: Began Edit. IV. of Origin. 



Paper on the Fertilisation of LescJienaultia. 



1872. Jan. loth : Finished proofs of Edit. IV. of the Origin^ 



and " again rewriting Expression" 

 Aug. 22nd : Finished last proofs of Expression. 



23rd : Began working at Drosera. 

 Nov. : Expression published (7000 copies, and 2000 



more printed at the end of the year). 



