6.3 Sibton
 
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The Cistercian Abbey of the Blessed Virgin Mary at Sibton lay in East Suffolk, six miles north-west of the market town of Saxmundham. It was colonized by a group of monks from the Abbey of Warden in Bedfordshire in the year 1150, which house was in turn founded from the Yorkshire Abbey of Rievaulx.
The site is by the banks of the River Yox, which is a relatively small river in a broad, shallow glacial valley cutting through the eastern edge of the Suffolk clay plateau. The site is in private ownership and there is little to be seen of the remains of the abbey from the road.
The founder was William de Cadomo, third son of a local Norman lord, Robert son of Walter, who was reputed to be the brother of William Malet, tenant in chief of the manor of Sibton at the time of the Domesday survey.   Robert married Sibilla, daughter and heir of Ralph de Cheyney, and their descendants took the maternal name.   A subsequent patroness of the Abbey was Margaret de Cressy, nee Cheyney, daughter and heir of William, and one by whom the original grants were substantially augmented.
Sibton was the only Cistercian house in Suffolk and a sister house of Sawtry in Huntingdonshire (1149) and Tilty in Essex (1153). It had wide possessions in East Suffolk and Norfolk.
A description of grange system has come from a study of the abbeys surviving manuscripts, owned by the local Scrivenor family. carried out by A.H. Denney.  In particular, this research has revealed that the monks were in the main stream of national agrarian developments.
At the dissolution its annual income was valued at £250, £58 more than Tintern.  With no large buildings to maintain this is a measure of the prosperity of four centuries of mixed farming in Suffolk.
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