January 1st: Continued at work on Variation until April 22nd. The work was interrupted by illness until late in the autumn.
February: Read paper on Climbing Plants.
December 25th: Began again on Variation.
1866.
Continued work at "Variation under Domestication."
March 1st to May 10th: At work on Edition IV. of the "Origin." Published June (1250 copies). Read paper on Cytisus scoparius to the Linnean Society.
December 22nd: Began the last chapter of "Variation under Domestication."
1867.
November 15th: Finished revises of "Variation under Domestication."
December: Began papers on Illegitimate Unions of Dimorphic and Trimorphic Plants, and on Primula.
1868.
January 30th: Publication of "Variation under Domestication."
February 4th: Began work on Man.
February 10th: New edition of "Variation under Domestication." Read papers on Illegitimate Unions of Dimorphic and Trimorphic Plants, and on Verbasc.u.m.
1869.
February 10th: "Finished fifth edition of "Origin"; has taken me forty-six days."
Edition 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 Woodp.e.c.k.e.r.
1871.
January 17th: Began the "Expression of the Emotions."
February 24th: "Descent of Man" published (2500 copies).
April 27th: Finished the rough copy of "Expression."
June 18th: Began Edition VI. of "Origin." Paper on the Fertilisation of Leschenaultia.
1872.
January 10th: Finished proofs of Edition VI. of the "Origin," and "again rewriting "Expression.""
August 22nd: Finished last proofs of "Expression."
August 23rd: Began working at Drosera.
November: "Expression" published (7000 copies, and 2000 more printed at the end of the year.)
November 8th: "At Murray"s sale 5267 copies sold to London booksellers."
1873.
January: Correcting the Climbing Plants paper for publication as a book.
February 3rd: At work on "Cross-fertilisation."
February to September: Contributions to "Nature."
June 14th: "Began Drosera again."
November 20th: Began "Descent of Man," Edition II.
1874.
"Descent of Man," Edition II, in one volume, published (Preface dated September). "Coral Reefs," Edition II., published.
April 1st: Began "Insectivorous Plants."
February to May: Contributed notes to "Nature."
1875.
July 2nd: "Insectivorous Plants" published (3000 copies); 2700 copies sold immediately.
July 6th: "Correcting 2nd edition of "Variation under Domestication.""
It was published in the autumn.
September 1st (approximately): Began on "Cross and Self-Fertilisation."
November: Vivisection Commission.
1876.
May 5th: "Finished MS., first time over, of "Cross and Self-Fertilisation.""
May to June: Correction of "Fertilisation of Orchids," Edition II. Wrote his Autobiographical Sketch.