With the ability to grow food and the acquisition of land by conquest by invading groups, the population grew. There were different classes of men. The freemen were eorls [noble freemen] or ceorls [ordinary free farmers]. Slaves were not free. Freemen had long hair and beards. Slaves' hair was shorn from their heads so that they were bald. Slaves were chained and often traded. Prisoners taken in battle, especially native Britons taken by invading groups, became slaves. A slave who was captured or purchased was a "theow". An "esne" was a slave who worked for hire. A "weallas" was a Welsh slave. Criminals became slaves of the person wronged or of the king. Sometimes a father pressed by need sold his children or his wife into bondage. Debtors, who increased in number during famine, which occurred regularly, became slaves by giving up the freeman's sword and spear, picking up a slave's mattock [pick ax for the soils], and placing their head within a lord's or lady's hands. They were called wite- theows. The original meaning of the word lord was "loaf-giver". Children with a slave parent were slaves. The slaves lived in huts around the homes of big landholders, which were made of logs and consisted on one large room or hall. An open hearth was in the middle of the earthen floor of the hall, which was strewn with rushes. There was a hole in the roof to let out the smoke. Here the landholder and his men would eat meat, bread, salt, hot spiced ale, and mead while listening to minstrels sing about the heroic deeds of their ancestors. Richer men drank wine. There were festivals which lasted several days, in which warriors feasted, drank, gambled, boasted, and slept where they fell. Physical strength and endurance in adversity were admired traits. Slaves often were used as grain grinders, ploughmen, sowers, haywards, woodwards, shepherds, goatherds, swineherds, oxherds, cowherds, dairymaids, and barnmen. Slaves had no legal rights. A lord could kill his slave at will. A wrong done to a slave was regarded as done to his owner. If a person killed another man's slave, he had to compensate him with the slave's purchase price. The slave owner had to answer for the offenses of his slaves against others, as for the mischief done by his cattle. Since a slave had no property, he could not be fined for crimes, but was whipped, mutilated, or killed. During famine, acorns, beans, peas, and even bark were ground down to supplement flour when grain stocks grew low. People scoured the hedgerows for herbs, roots, nettles, and wild grasses, which were usually left for the pigs. Sometimes people were driven to infanticide or group suicide by jumping together off a cliff or into the water.