From the Cosmiques or Simond Hut area desend the Vallee Blanch to the couloir between the first two rock formations below the Arete des Cosmiques ridge. Up the couloir to the right starts the rock face.
This route is described in the guide books. I took route notes from Gaston Rebuffat's The Mont Blanc Massif (the 100 finest routes). When I climbed it July 22, 1976 it was quite popular. A short climb no more than 3-3 1/2 hours using some aid climbing in the overhangs. You can make several variations on this short but interesting face.
Etriers are needed for the overhanging spots, Although when I climbed the route we just used some long slings.
If you have information about this route that doesn't pertain to any of the other sections, please add it here.