sentences:  He had had little food over the four days which had made him weak and vulnerable.Caganoff bivvied next to a small snow drift on the north side of the ridge, overlooking the headwaters of the Carhuasanta (and unbeknown to him as the source until many years later).The next morning he abandoned his goal of reaching the summit of Mismi and headed east off the ridge, walking a day and a half down into the Colca.