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 Woodpecker.

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