WILLIAM BUCKLAND English Following Cuvier, you argued for a relatively recent geological "revolution" – a unique break with the past just prior to the "present order of things" – for which you found evidence in various cave deposits and fossils. However, you later converted to an alternative explanation – the glacial theory – following a visit to the Alps and a tour of Scotland with Louis Agassiz. On GoogleEarth Tour pay particular attention to: Reliquiae Diluvianae +? Alps? +? Glen Roy? Familiarize yourself with the following Episodes: Paris Vindiciae Geologicae - Reliquiae Diluvianae 1840 Visit to Britain Read and summarize: Appendix to Vindiciae Geologicae (p.38 of the pdf file) Reliquae Diluvianae, Part 2 "On the evidences of glaciers in Scotland and the north of England" (Part 1) Be aware: There is nothing wrong with having abandoned the diluvial camp in favor of glaciation (in fact it is perhaps entirely to your credit): but your colleague and friend Lyell is not entirely convinced and this might influence you in favor of some "hybrid" theory.