I want to know the answer to the following question:
What was the most severe form of physical punishment at Eton referred to as?
All the background I'm provided with is that "Less common but more severe were the canings administered by Pop (see Eton Society below) in the form of a "Pop-Tanning", in which a large number of hard strokes were inflicted by the President of Pop in the presence of all Pop members (or, in earlier times, each member of Pop took it in turns to inflict a stroke).". Is that enough to answer the question?
Answer: yes