After this hunting and gathering era, there was farming and domestication of animals such as horses, pigs, sheep, goats, chicken, and cattle. Of these, the pig was the most important meat supply, being killed and salted for winter use. Next in importance were the cattle. Sheep were kept primarily for their wool. Flocks and herds were taken to pastures. The male cattle, with wood yokes, pulled ploughs in the fields of barley and wheat. The female goat and cow provided milk, butter, and cheese. The chickens provided eggs. The hoe, spade, and grinding stone were used. Cloth was woven for clothes. Pottery was made from clay and used for food preparation and consumption. During the period of "lent" [from the word "lencten", which means spring], it was forbidden to eat any meat or fish. This was the season in which many animals were born and grew a lot. The people also made boats. Circles of big stones like Stonehenge were built so that the sun's position with respect to the stones would indicate the day of longest sunlight and the day of shortest sunlight. Between these days there was an optimum time to harvest the crops before fall, when plants dried up and leaves fell from the trees. The winter solstice, when the days began to get longer was cause for celebration. In the next season, there was an optimum time to plant seeds so they could spring up from the ground as new growth. So farming gave rise to the concept of a year. Certain changes of the year were celebrated, such as Easter; the twelve days of Yuletide when candles were lit and houses decorated with evergreen; Plough Monday for resumption of work after Yuletide; May Day when greenery was gathered from the woods and people danced around a May pole; Whitsun when Morris dancers leapt through their villages with bells, hobby-horses, and waving scarves; Lammas when the first bread was celebrated; and Harvest Home when the effigy of a goddess was carried with reapers singing and piping behind. There were settlements on high ground and near rivers. Each settlement had a meadow, for the mowing of hay, and a mill, with wooden huts, covered with branches or thatch, of families clustered nearby. Grain was stored in pits in the earth. Each hut had a garden for fruit and vegetables. A goat or cow might be tied out of reach of the garden. There was a fence or hedge surrounding and protecting the garden area and dwelling. Outside the fence were an acre or two of fields of wheat and barley, and sometimes oats and rye. Wheat and rye were sown in the fall, and oats and barley in the spring. They were all harvested in the summer. These fields were usually enclosed with a hedge to keep animals from eating the crop. Flax was grown and made into linen cloth. Beyond the fields were pastures for cattle and sheep grazing. There was often an area for beehives.