Reactions to On the Origin of Species one hundred million years." Copies of the second edition were advertised as ready on 24 December, in advance of official publication on 7 January 1860. The "Saturday Review" of 24 December 1859 strongly criticised the methodology of Darwin's calculations. On 3 January 1860, Darwin wrote to Hooker about it: "Some of the remarks about the lapse of years are very good, & the Reviewer gives me some good & well deserved raps,—confound it I am sorry to confess the truth. But it does not at all concern main argument." A day later, he said to Lyell "You saw I suppose
On the Origin of Species rhea (though their territories overlapped), that mockingbirds collected on the Galápagos Islands represented three separate species each unique to a particular island, and that several distinct birds from those islands were all classified as finches. Darwin began speculating, in a series of notebooks, on the possibility that "one species does change into another" to explain these findings, and around July sketched a genealogical branching of a single evolutionary tree, discarding Lamarck's independent lineages progressing to higher forms. Unconventionally, Darwin asked questions of fancy pigeon and animal breeders as well as established scientists. At the zoo he had his first sight