Tyuonyi, the Hidden Valley, might have been like an oasis in the desert. Who can say that there was sufficient water in the canyons and on the mesas to the north—that water holes did not go dry and that the Tewas did not have to depend upon waters from the heavens to make their corn grow? And who can say that the waters of El Rito de Los Frijoles dried up? One can only suppose. But judging by climatic conditions as they are today, Frijoles Canyon was one of the main sources of water on the Pajarito. Since water was a controlling factor in the lives of these people, what primitive group of Indians would not fight over the right to live in a well-watered valley—a green and beautiful valley—where adequate shelter was afforded by the vertical walls of a high north cliff? Certain things hint that little time passed before Tewa-speaking groups penetrated the Valley of the Frijoles again and in larger numbers than before. Slowly and surely they trickled in a few at a time. Over a period of years the infiltration was heavy. Deep trails were worn in the soft rock ledges by the passing over of thousands of moccasined feet going to and from the northern villages some ten miles distant. The steam of hatred between the jealous groups could have cooled off but probably never completely. Toward the close of the fifteenth century primitive Tewa farmers, it seems, had again settled in Frijoles Canyon. [Illustration: Building house] They went to work in earnest this time, building houses; not with mud walls which would wash down when it rained, but with walls of stone, which type of construction their predecessors had begun. Some of the caves occupied by the earlier people could have eroded away while others could have been re-hewn by these later occupants. Who knows? Crumbling remains of old talus houses might have been leveled off at the base of the cliff and new homes built over them. Indian men carved the heavy stones into square and rectangular blocks with stone axes. The stones lay almost flat and the masons did not have to be too careful in their fashioning because small pieces of rock hammered tight in the joints would hold the blocks steady. These walls were laid on footings of smooth-worn river pebbles. Block after block was carved and laid into structures seven feet high. Indian women carried water from the little river in ollas on the tops of their heads and trudged day after day up the steep slopes to the cliff. They gathered clay, perhaps not from Frijoles Canyon, because it was hard to find. They might have traveled miles for enough to apply a thin coating of wash over the stone walls of their homes.