[The growth of the 'Origin of Species' has been briefly described in my father's words (above). The letters given in the present and following chapters will illustrate and amplify the history thus sketched out.]
It is clear that in the early part of the voyage of the "Beagle" he did not feel it inconsistent with his views to express himself in thoroughly orthodox language as to the genesis of new species. Thus in 1834 he wrote (MS. Journals, page 468.) at Valparaiso: "I have already found beds of recent shells yet retaining their colour at an elevation of 1300 feet, and beneath, the level country is strewn with them. It seems not a very improbable conjecture that the want of animals may be owing to none having been created since this country was raised from the sea."
This passage does not occur in the published 'Journal,' the last proof of which was finished in 1837; and this fact harmonizes with the change we know to have been proceeding in his views. But in the published 'Journal' we find passages which show a point of view more in accordance with orthodox theological natural history than with his later views. Thus, in speaking of the birds Synallaxis and Scytalopus (1st edition page 353; 2nd edition page 289), he says: "When finding, as in this case, any animal which seems to play so insignificant a part in the great scheme of nature, one is apt to wonder why a distinct species should have been created."
A comparison of the two editions of the 'Journal' is instructive, as giving some idea of the development of his views on evolution. It does not give