Not sure about the beta description- Does having beta necessarily imply that it is the easiest way to climb a problem - good beta Vs Bad beta?
Thanks Barry, that's a good point.
Met a guy last weekend in Northumberland who told me that the "gaston" move came from French aplinist Gaston Rébuffat. I knew Rébuffat and I knew the move but I had never made the connection. It takes an Englishman to teach French to the French :-)) Note sure if it's relevant for your glossary though.
Thanks Pierre, very interesting.