Scrambling grades were invented by Steve Ashton in his Scrambles of Snowdonia book (pb Cicerone). Before then, nobody looked on scrambles as anything other than scruffy, easy rock-climbs hardly worthy of a grade. Only the very famous scrambles like Pinnacle Ridge on St Sunday Crag merited that – and the only term available was the ‘Moderate’ rock-climbing grade. Ashton’s book rightly reclaims those ‘Moderates’ and places them where they should be – at the top end of a sport which has more in common technically with tree-climbing than rock-climbing. They don’t feel like  rock-climbs in terms of the moves, but they can involve similiar exposure and demand no less care.