From the Anglo Saxon Chronicle

A.D. 1137. This year went King Stephen over sea to Normandy, and there was received; for that they concluded that he should be all such as the uncle was; and because he had got his treasure: but he dealed it out, and scattered it foolishly. Much had King Henry gathered, gold and silver, but no good did men for his soul thereof. When the King Stephen came to England, he held his council at Oxford; where he seized the Bishop Roger of Sarum, and Alexander, Bishop of Lincoln, and the chancellor Roger, his nephew; and threw all into prison till they gave up their castles. When the traitors understood that he was a mild man, and soft, and good, and no justice executed, then did they all wonder. They had done him homage, and sworn oaths, but they no truth maintained. They were all forsworn, and forgetful of their troth; for every rich man built his castles, which they held against him: and they filled the land full of castles. They cruelly oppressed the wretched men of the land with castle-works; and when the castles were made, they filled them with devils and evil men. Then took they those whom they supposed to have any goods, both by night and by day, labouring men and women, and threw them into prison for their gold and silver, and inflicted on them unutterable tortures; for never were any martyrs so tortured as they were. Some they hanged up by the feet, and smoked them with foul smoke; and some by the thumbs, or by the head, and hung coats of mail on their feet. They tied knotted strings about their heads, and twisted them till the pain went to the brains. They put them into dungeons, wherein were adders, and snakes, and toads; and so destroyed them. Some they placed in a crucet-house; that is, in a chest that was short and narrow, and not deep; wherein they put sharp stones, and so thrust the man therein, that they broke all the limbs. In many of the castles were things loathsome and grim, called “Sachenteges”, of which two or three men had enough to bear one. It was thus made: that is, fastened to a beam; and they placed a sharp iron [collar] about the man’s throat and neck, so that he could in no direction either sit, or lie, or sleep, but bear all that iron. Many thousands they wore out with hunger. I neither can, nor may I tell all the wounds and all the pains which they inflicted on wretched men in this land. This lasted the nineteen winters while Stephen was king; and it grew continually worse and worse. They constantly laid guilds on the towns, and called it “tenserie”; and when the wretched men had no more to give, then they plundered and burned all the towns; that well thou mightest go a whole day’s journey and never shouldest thou find a man sitting in a town, nor the land tilled. Then was corn dear, and flesh, and cheese, and butter; for none was there in the land. Wretched men starved of hunger. Some had recourse to alms, who were for a while rich men, and some fled out of the land. Never yet was there more wretchedness in the land; nor ever did heathen men worse than they did: for, after a time, they spared neither church nor churchyard, but took all the goods that were therein, and then burned the church and all together. Neither did they spare a bishop’s land, or an abbot’s, or a priest’s, but plundered both monks and clerks; and every man robbed another who could. If two men, or three, came riding to a town, all the township fled for them, concluding them to be robbers. The bishops and learned men cursed them continually, but the effect thereof was nothing to them; for they were all accursed, and forsworn, and abandoned. To till the ground was to plough the sea: the earth bare no corn, for the land was all laid waste by such deeds; and they said openly, that Christ slept, and his saints.

http://avalon.law.yale.edu/medieval/ang12.asp