sentences:  Under Abbot Ægelric the fens were tilled, the monastery grew rich, and the town increased in size, enormous tracts of land being held by the abbey at the Domesday Survey.The "Croyland Chronicle" (1144–1486 ), an important source for medieval historians, is believed to be the work of some of the monastery's inhabitants.The town was nearly destroyed by fire (1469–1476), but the abbey tenants were given money to rebuild it.