struggle, between the serf and his lord for political power. The struggle came, but it was conscious and very fierce. It was brought about by a terrible pestilence, known as the Black Death. This plague came slowly and steadily from the East; in 1348 it reached Bristol, and it probably swept away one half of the people of the towns of Wales. It was not the towns alone that it visited; it came to the mountain glens as well. It was a most deadly disease. It killed, for one thing,because people believed that they would die. They saw the dark spots on the skin before they became feverish; they recognised the black mark of the Death and they gave themselves up for lost.
Labourers became very scarce. They claimed higher wages. The lords tried to drag them back into serfdom; they tried to force them by law to take the old wage. On both sides of the Severn the labourers took arms, and waged war against their lords. The peasant war in England is called the Peasant Revolt; the peasant war in Wales is sometimes called the revolt of Owen Glendower.
A change came over the rebellions in Wales. At first, the rebellions were those of Llywelyn's country; the allies who had
