The first desideratum in the minds of the old pueblo builders in choosing the location of their habitations was nearness to some area of tillable land. This land was generally adjacent to the site of the village, and was almost invariably overlooked by it. In fact this requirement was considered of far more importance than adaptability to defense, for the latter was often sacrificed to the former. A good example in which both requirements have been fully met is the ruin under discussion. This, however, is the result of an exceptionally favorable environment; as a rule the two requirements conflict with each other, and it is always the latter requirement--adaptability to defense--which suffers. These statements are true even of the so-called fortresses, of the cavate lodges, of the cliff ruins, and of many of the large village ruins scattered over the southwestern portion of the United States. In the case of the large village ruins, however, there is another feature of pueblo life which sometimes produces a different result, viz, the use of outlying single houses or small clusters separated from the main village and used for temporary abode during the farming season only. This feature is well developed in some of the modern pueblos, particularly in Zuñi and Acoma. The principle illustrated by this ruin is an important one. Among the ancient pueblo builders there was no military art, or rather the military art was in its infancy; purely defensive structures, such as fortresses, were unknown, and the idea of defense never reached any greater development than the selection of an easily defended site for a village, and seldom extended to the artificial improvement of the site. There is another result of this lack of military knowledge not heretofore alluded to, which will be discussed at length on some other occasion and can only be mentioned here: this is the aggregation of a number of small villages or clusters into the large many-storied pueblo building, such as the modern Zuñi or Taos.