On 14 May 1856, Charles Darwin recorded in his journal that, on the advice of his friend Charles Lyell, after almost 20 years exploring the subject, he had finally begun writing a ‘sketch’ of his ideas on species.
On 20th February 1835, while taking a rest in a wood in Valvidia, Southern Chile, Charles Darwin experienced a major earthquake.
On 10th January 1860, Charles Darwin wrote to his good friend the geologist Charles Lyell, humorously describing mankind’s ancestor.
In 1841, Darwin's ill-health evidently left him with low expectations of his future ability to contribute to science.
Charles Darwin finally went public with his theory of evolution by means of Natural Selection on 1st July 1858.