The origin of species by Natural Selection

Charles Darwin as a naturalist travelled extensively the world over from 27th December 1831 to October 1836 and returned to England. Based on his collections of living and fossil material he published a book "The origin of species by Natural Selection" in 1859. Before publishing his book, he was very much influenced by C. Lyell (Geologist) who pointed out that the natural forces that existed in the past are the same as those existing at present.