The Ynca Ccapac Yupanqui was proud of the result, of the bridge, which we call Huaca-chaca, over the river Apurimac, and ordered another to be made across the Desaguadero (drain) of the lake of Titicaca, because he intended soon to proceed with the conquest of other provinces in the Colla-suyu region. For, that land being flat and favourable for the march of armies the Yncas found the conquest of it to be desirable, and for this reason they persevered until they had possession of the whole of it. The bridge of Huaca-chaca, and nearly all the others in Peru, are made of osiers; and that over the river called by the Spaniards the Desaguadero, is also of twisted fibres and other materials. It is on the water, like the bridge of boats at Seville, and is not in the air, as are the bridges of twisted fibre which have already been described. There grows, throughout Peru, a long kind of straw, soft and flexible, which the Indians call ychti and with which they thatch their houses. It is much made use of, and is excellent pasturage for sheep, and the Collas make baskets and hampers of it, which they callpataas (like small boxes), as well as ropes and cables. Besides this good straw, a very great quantity of reeds grows on the banks of lake Titicaca, which are called espadena or enea. At the proper time the Indians of the provinces, who are obliged to make the bridge, cut a large quantity of reeds, that they may be dried and ready when the bridge is to be repaired.