Part of the time, probably during the cold seasons, the Basket Makers lived in caves. These offered shelter from the elements and provided safe, dry places for the storage of food. The women built their fires in level sheltered areas and around these fires centered most of the activities. In the rear of the cave they constructed storage cists for their corn. Small pits were dug in the cave floor and were lined with slabs of sandstone chinked with bark and mud. Over the pit was placed a roof of poles and packed earth, leaving only a small hatchway which was closed with a thin stone slab. Such cists were secure and dry and served as excellent storage bins for the year’s harvest of corn. When the people left the cave for any length of time they could conceal the storage pits by covering them over with earth and stones so they would not be detected by chance visitors. Even though most of the Basket Maker remains have been found in caves it is probable that they lived in the open near their fields for at least part of the year. As farming became more important to them they were forced to protect their crops. Each farm needed to be watched carefully to prevent damage by birds and mammals or even by men of other groups. Because of this necessity of living near their fields it is probable that they erected temporary shelters for protection from the sun and rain. A mere framework of poles covered with brush and grass would have sufficed. No trace of these temporary shelters has been found but there is a strong feeling that they did exist. Recent excavations have revealed that in one area the Basket Makers began experimenting with permanent houses at an earlier date than formerly had been realized. Near Durango, Colorado, Mr. Earl H. Morris, of the Carnegie Institution, excavated a number of house structures, both in caves and on open hillsides, which date from the first and second centuries A.D. While these houses were crude when compared with the standardized pithouses which later came into wide use, they do indicate that the Basket Makers, in that area at least, began to experiment with permanent structures soon after they became a farming people. Further excavation may reveal that crude, hogan-like structures were in general use at an earlier date than has been realized. The absence of pottery during Basket Maker times resulted in a widespread use of baskets and, as the name implies, basketry was the major craft. Many of the baskets of this period are superb examples of workmanship and design. Skillfully woven, artistically decorated and gracefully shaped they are outstanding among the basketry of the early Indians. Shallow trays were the most common form but there were also bowls, water baskets, deep carrying baskets and small baskets which probably served for storing trinkets and ceremonial objects. Large, flexible bags were also woven and these were often split open and used as burial wrappings.