.... Once below these slopes of snow, says the journal of young de Pourtales again, rocks almost vertical, or narrow ledges covered with grass, served us as a road and brought us to the glacier of the Grindelwald . To reach the glacier itself we traversed a crevasse of great depth, and some twenty feet wide, on a bridge of ice, one or two feet in width, and broken toward the end, where we were obliged to spr...