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OMIT 1866 1869
1859
— — — 1860
— — 1861
OMIT 1872

organic beings inhabiting 1861 1866 1869 1872
inhabitants of 1859 1860

as will be seen in the latter chapters of this volume, seemed 1861 1866 1869 1872
seemed to me 1859 1860

two or three 1859 1860 1861 1866 1869
many 1872

ON THE
ON THE
ORIGIN OF
SPECIES.
SPECIES,
....
....
....
OMIT
....
OMIT
INTRODUCTION.
WHEN on board H.M.S. 'Beagle,' as naturalist, I was much struck with certain facts in the distribution of the organic beings inhabiting South America, and in the geological relations of the present to the past inhabitants of that continent. These
facts
facts,
as will be seen in the latter chapters of this volume, seemed to throw some light on the origin of species— that mystery of mysteries, as it has been called by one of our greatest philosophers. On my return home, it occurred to me, in 1837, that something might perhaps be made out on this question by patiently accumulating and reflecting on all sorts of facts which could possibly have any bearing on it. After five years' work I allowed myself to speculate on the subject, and drew up some short notes; these I enlarged in 1844 into a sketch of the conclusions, which then seemed to me
probable;
probable:
from that period to the present day I have steadily pursued the same object. I hope that I may be excused for entering on these personal details, as I give them to show that I have not been hasty in coming to a decision.
My work is now
(1859) nearly
nearly
finished; but as it will take me two or three more years to complete it, and as my health is far from strong, I have been urged to publish this Abstract. I have more especially been induced