Everest Attempt. On August 20, Jan Harris and I arrived at the 5600-meter-high Rongbuk Glacier Base Camp. On the 24th, we placed Advance Base at 6400 meters at the foot of the North Col. We established Camps I and II on the North Col and north ridge at 7000 and 7500 meters on August 28 and September 8. We made three attempts to regain Camp II between September 12 and October 8 in order to cross the north face to the Great Couloir. On October 14, Harris descended to Base Camp while I established Camp III at 7600 meters. I placed Camp IV the next day at 7800 meters half way across the face between the north ridge and the couloir. This camp was partially destroyed by high winds in the predawn hours of the 16th and I abandoned further attempts.