National Geographic : 1913 Apr
Photo by Hiram Bingham HELD'S BRIDGE: MACHU PICCHU The completed bridge over the rapids of the Urubamba, showing the forked upright still in place. The great difficulty in building this bridge lay in the fact that the timber was of such density that it would not float. thrust out over the water toward rock No. 2, the end being held up by a rope fastened around it and passing through the fork of the upright (see Fig. 2, page 422). "This method proved success ful, the timber's end being laid on the rock which formed our second pier. Two more light timbers were put across this way, and then a heavy one was tried, part of its weight being borne by the pieces already across by means of a yoke locked in the end (see Fig. 3). This and another piece were suc cessfully passed over, and after that there was little trouble, cross pieces being used to form the next and shorter span. "On the second day of work we finished the bridge about noon and started making a trail up the hill under the guidance of a half breed who lived in the vicinity. After the first quarter mile the going was very slow. Not only did the steepness of the slope and the tangled condition of the cane jungle retard us, but the men were very much afraid of snakes, a fear which proved itself justified, for one of them was very nearly bit ten by a little gray snake about 12 inches long. "The second day's work on the Photo by Hiram Bingham THE EXPEDITION EN ROUTE TO MACHU PICCHU: URUBAMBA CANON A newly repaired part of the government road and a portion of our caravan en route to Machu Picchu.