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."