How did Darwin use scientific methods such as making observations analyzing data and drawing conclusions before presenting his ideas on the theory of evolution by natural selection?

Darwin made extensive observations of various species during his travels on the HMS Beagle, collected data through meticulous note-taking and specimen collection, and then analyzed and synthesized this data over many years before presenting his theory of evolution by natural selection in his book "On the Origin of Species". This process involved rigorous scientific methods that combined empirical evidence with logical reasoning.