"Mammalia", by G.R. Waterhouse, with a "Notice of their habits and ranges",
by Charles Darwin.

1840:

Contributed Geological Introduction to Part I. ("Fossil Mammalia") of the
"Zoology of the Voyage of H.M.S. 'Beagle'" by Richard Owen.

1842:

"In June 1842 I first allowed myself the satisfaction of writing a very
brief abstract of my (species) theory in pencil in 35 pages; and this was
enlarged during the summer of 1844 into one of 230 pages, which I had
fairly copied out and still (1876) possess." (The first draft of "The
Origin of Species", edited by Mr Francis Darwin, will be published this
year (1909) by the Syndics of the Cambridge University Press.)

Sept. 14. Settled at the village of Down in Kent.

"I think I was never in a more perfectly quiet country."

Publication of "The Structure and Distribution of Coral Reefs"; being Part
I. of the "Geology of the Voyage of the Beagle".

1844:

Publication of "Geological Observations on the Volcanic Islands visited
during the Voyage of H.M.S. 'Beagle'"; being Part II. of the "Geology of
the Voyage of the 'Beagle'".