he Voyage of H.M.S. 'Beagle'"; being Part II. of the "Geology of
the Voyage of the 'Beagle'".

"I think much more highly of my book on Volcanic Islands since Mr Judd,
by far the best judge on the subject in England, has, as I hear, learnt
much from it." (Autobiography, 1876.)

1845:

Publication of the "Journal of Researches" as a separate book.

1846:

Publication of "Geological Observations on South America"; being Part
III. of the "Geology of the Voyage of the 'Beagle'".

1851:

Publication of a "Monograph of the Fossil Lepadidae" and of a "Monograph
of the sub-class Cirripedia".

"I fear the study of the Cirripedia will ever remain 'wholly unapplied,'
and yet I feel that such study is better than castle-building."

1854:

Publication of Monographs of the Balanidae and Verrucidae.

"I worked steadily on this subject for...eight years, and ultimately
published two thick volumes, describing all the known living
species, and two thin quartos on the extinct species... My work was of
considerable use to me, when I had to discuss in the "Origin of Species"
the principles of a natural classification. Nevertheless, I doubt
whether the work was worth the consumption of so much time."

"From September 1854 I devoted my whole time to arranging my huge
pile of notes, to observing, and to experimenting in relation to the
transmutation of species."

1856:

"Early in 1856 Lyell advised me to write out my views pretty fully, and
I began at once to do so on a scale three or four times as extensive as
that which was afterwards followed in my 'Origin of Species'."

1858:

Joint paper by Charles Darwin and Alfred Russel Wallace "On the Tendency
of Species to form Varieties; and on the perpetuation of Varieties and
Species by Natural Means of Selection," communicated to the Linnean
Society by Sir Charles Lyell and Sir Joseph Hooker.

"I was at first very unwilling to consent (to the communication of his
MS. to the Society) as I thought Mr Wallace might consider my doing so
unjustifiable, for I did not then know how generous and noble was his
disposition."

"July 20 to Aug. 12 at Sandown (Isle of Wight) began abstract of Species
book."

1859:

Nov. 24. Publication of "The Origin of Species" (1250 copies).

"Oh, good heavens, the relief to my head and body to banish the whole
subject from my mind!... But, alas, how frequent, how almost universal it
is in an author to persuade himself of the truth of his own dog