Okay - how did it go from 4th class to 5.3?
The the isn't needed Earl Grey 
1. In my follow-up discussion with Dave he specifically recalled rating it 5.3 then, in the early 1970s. We laughed about that rating nowadays, but he felt that then he was able to differentiate fairly well between the easier grades. I'll go with that memory instead of you, me and Alan's estimation of class four (although I'll change the rating if it ever dries out enough that we can climb it and see how it feels in this more modern era).
2. The The is needed peppermint. Try saying the name out loud (do it while you're driving on the roadway designated as Highway One Hundred One without the The). It sounds right with it and it doesn't sound right without it, and besides, Dave himself, who's been climbing longer than all of us put together, called it The Tea Bag.