During my second year at Edinburgh [1826-27] I attended Jameson's lectures on Geology and Zoology, but they were incredible dull. The sole effect they produced on me was the determination never as long as I lived to read a book on Geology.
What's interesting is that when you get into the post-war period, many of the narratives in books and movies conclude that if you killed Hitler, you're actually going to make history worse.