Darwin's writings

There's a site that's been around awhile, but I want to mention it. Pretty much everything that Darwin wrote is there. The Complete Works of Darwin - I go and glance through the writings every once in awhile as it displays some of the best of what is science. Looking for facts, asking how those facts can be put together into an idea, coming up with a way to test that idea to see whether one can figure out what facts one hasn't seen yet and testing those ideas until they are clear enough to become a theory.