 At least two groups of transitional Basketmaker II people inhabited the San Juan Basin during this period, as increased rainfall allowed for sustained agriculture and permanent settlements by 1 CE, when the water table rose and intermittent streams became more reliable.During the first four centuries CE, the Basketmaker II people established pit-houses at elevated locations near sources of water and arable land.Brian M. Fagan notes that the development of pottery in the area during the 4th century permitted the boiling of maize and beans for the first time, and "must have brought a revolution in cooking".