UKC Logbook Description
Not sure of grade-possibly AD-. The alternative route if weather is too bad to do Cosmiques Ridge. Starts from Col du Midi (3532m). As you walk away from aiguille du midi turn right to approach the ridge running south west of cosmiques hut (3817m). Mixed scramble and easy climbing but very exposed climbing across l'arete a laurence. Whole route very exposed with a particularly scary traverse near the end probably best done with some protection. A ladder at the end of the route takes you in to the back entrance of the cosmiques hut.
UPDATE: Large loose block (small lorry size) that is waiting to go down the north face near the hut end, the route traverses over the block. Would easily cut rope/slings if used for protection. Could be avoided by a very dangerous scree traverse below the block.